How to use the alloy/underscore._ function in alloy

var isTitanium = typeof Titanium !== 'undefined';
var _, generatePlatformArray;

if (isTitanium) {
	_ = require('alloy/underscore')._;
} else {
	var platforms = require('../../platforms/index');
	_ = require('../lib/alloy/underscore')._;

	// iterate through supported platforms to create specific constants
	generatePlatformArray = function(key) {
		var ret = [];
		_.each(_.keys(platforms), function(p) {
			ret.push(platforms[p][key]);
		});
		return ret;
	};

	// generate compile time constants based on supported platforms
	exports.PLATFORMS = generatePlatformArray('platform');
	exports.PLATFORM_FOLDERS_ALLOY = generatePlatformArray('alloyFolder');

var isTitanium = typeof Titanium !== 'undefined';
var _, generatePlatformArray;

if (isTitanium) {
	_ = require('alloy/underscore')._;
} else {
	var platforms = require('../../platforms/index');
	_ = require('../lib/alloy/underscore')._;

	// iterate through supported platforms to create specific constants
	generatePlatformArray = function(key) {
		var ret = [];
		_.each(_.keys(platforms), function(p) {
			ret.push(platforms[p][key]);
		});
		return ret;
	};

	// generate compile time constants based on supported platforms
	exports.PLATFORMS = generatePlatformArray('platform');
	exports.PLATFORM_FOLDERS_ALLOY = generatePlatformArray('alloyFolder');

/**
 * SQL Rest Adapter for Titanium Alloy
 * @author Mads Møller
 * @version 0.3.4
 * Copyright Napp ApS
 * www.napp.dk
 */

var _ = require('alloy/underscore')._,
    Alloy = require("alloy"),
    Backbone = Alloy.Backbone,
    moment = require('alloy/moment');

// The database name used when none is specified in the
// model configuration.
var ALLOY_DB_DEFAULT = '_alloy_';
var ALLOY_ID_DEFAULT = 'alloy_id';

var cache = {
	config : {},
	Model : {},
	URL : null
};

// The sql-specific migration object, which is the main parameter

storeModel(data);
        resp = model.toJSON();
        break;

      case "delete":
        delete data[model.id];
        storeModel(data);
        resp = model.toJSON();
    }
    if (resp) {
        _.isFunction(opts.success) && opts.success(resp);
        "read" === method && model.trigger("fetch");
    } else _.isFunction(opts.error) && opts.error(resp);
}

var _ = require("alloy/underscore")._;

module.exports.sync = Sync;

module.exports.beforeModelCreate = function(config) {
    config = config || {};
    config.data = {};
    InitAdapter();
    return config;
};

module.exports.afterModelCreate = function(Model) {
    Model = Model || {};
    Model.prototype.config.Model = Model;
    return Model;
};

/**
 * Set the ETag for the given url
 * @param {Object} url
 * @param {Object} eTag
 */
function setETag(url, eTag) {
	if (eTag && url) {
		var obj = Ti.App.Properties.getObject("NAPP_REST_ADAPTER", {});
		obj[url] = eTag;
		Ti.App.Properties.setObject("NAPP_REST_ADAPTER", obj);
	}
}

//we need underscore
var _ = require("alloy/underscore")._;

//until this issue is fixed: https://jira.appcelerator.org/browse/TIMOB-11752
var Alloy = require("alloy"), Backbone = Alloy.Backbone;

module.exports.sync = Sync;

module.exports.beforeModelCreate = function(config, name) {
	config = config || {};
	InitAdapter(config);
	return config;
};

module.exports.afterModelCreate = function(Model, name) {
	Model = Model || {};
	Model.prototype.config.Model = Model;
	Model.prototype.idAttribute = Model.prototype.config.adapter.idAttribute;

/**
 * Set the ETag for the given url
 * @param {Object} url
 * @param {Object} eTag
 */
function setETag(url, eTag) {
	if (eTag && url) {
		var obj = Ti.App.Properties.getObject("NAPP_REST_ADAPTER", {});
		obj[url] = eTag;
		Ti.App.Properties.setObject("NAPP_REST_ADAPTER", obj);
	}
}

//we need underscore
var _ = require("alloy/underscore")._;

//until this issue is fixed: https://jira.appcelerator.org/browse/TIMOB-11752
var Alloy = require("alloy"), Backbone = Alloy.Backbone;

module.exports.sync = Sync;

module.exports.beforeModelCreate = function(config, name) {
	config = config || {};
	InitAdapter(config);
	return config;
};

module.exports.afterModelCreate = function(Model, name) {
	Model = Model || {};
	Model.prototype.config.Model = Model;
	Model.prototype.idAttribute = Model.prototype.config.adapter.idAttribute;

var Alloy = require("alloy"), _ = require("alloy/underscore")._, model, collection;

var Q = require("q");

exports.definition = {
    config: {
        columns: {
            objectId: "text PRIMARY KEY",
            User_objectId: "text",
            User_object: "text",
            mainPhone: "text",
            User_objectId_To: "text",
            User_object_To: "text",
            firstName: "text",
            middleName: "text",
            lastName: "text",
            fullName: "text",

var packageDir = "ti.meteor/packages/";

_ = typeof Alloy != "undefined" ? require("alloy/underscore")._ : require(packageDir + 'underscore');
Meteor = require(packageDir + 'meteor').Meteor;
var Accounts = {},
	OS_ANDROID = OS_ANDROID || Ti.Platform.osname == "android",
	OS_IOS = OS_IOS || !OS_ANDROID,
	Session = require(packageDir + 'reactive-dict').ReactiveDict;

require(packageDir + 'dynamics_browser');
require(packageDir + 'errors');
ServiceConfiguration = {};
ServiceConfiguration.configurations = {
	findOne:function(query) {
		return ServiceConfiguration.loginServices[query.service];
	}
}
ServiceConfiguration.loginServices = {};

model.set(model.idAttribute, model.id);
        }
        TAP.setObject(prefix + "-" + model.id, model.toJSON() || {});
        resp = model.toJSON();
    } else if ("delete" === method) {
        TAP.removeProperty(prefix + "-" + model.id);
        model.clear();
        resp = model.toJSON();
    }
    if (resp) {
        _.isFunction(opts.success) && opts.success(resp);
        "read" === method && model.trigger("fetch");
    } else _.isFunction(opts.error) && opts.error(resp);
}

var Alloy = require("alloy"), _ = require("alloy/underscore")._, TAP = Ti.App.Properties;

module.exports.sync = Sync;

module.exports.beforeModelCreate = function(config) {
    config = config || {};
    config.columns = config.columns || {};
    config.defaults = config.defaults || {};
    ("undefined" == typeof config.columns.id || null === config.columns.id) && (config.columns.id = "String");
    return config;
};

_.each(config.columns, function(type, name) {
            colStrings.push(name);
            fullStrings.push(name + " " + type);
        });
        var colsString = colStrings.join(",");
        db.execute("ALTER TABLE " + table + " RENAME TO " + table + "_temp;");
        db.execute("CREATE TABLE " + table + "(" + fullStrings.join(",") + "," + ALLOY_ID_DEFAULT + " TEXT UNIQUE);");
        db.execute("INSERT INTO " + table + "(" + colsString + "," + ALLOY_ID_DEFAULT + ") SELECT " + colsString + ",CAST(_ROWID_ AS TEXT) FROM " + table + "_temp;");
        db.execute("DROP TABLE " + table + "_temp;");
        config.columns[ALLOY_ID_DEFAULT] = "TEXT UNIQUE";
        config.adapter.idAttribute = ALLOY_ID_DEFAULT;
    }
    db.close();
}

var _ = require("alloy/underscore")._;

var ALLOY_DB_DEFAULT = "_alloy_";

var ALLOY_ID_DEFAULT = "alloy_id";

var cache = {
    config: {},
    Model: {}
};

module.exports.beforeModelCreate = function(config, name) {
    if (cache.config[name]) return cache.config[name];
    throw "No support for Titanium.Database in MobileWeb environment.";
};

module.exports.afterModelCreate = function(Model, name) {