How to use the ajv/lib/compile/formats.js.full function in ajv

const util = require('util');

const yaml = require('js-yaml');
const should = require('should');
const co = require('co');
let ajv = require('ajv')({
    allErrors: true,
    verbose: true,
    jsonPointers: true,
    patternGroups: true,
    extendRefs: true // optional, current default is to 'fail', spec behaviour is to 'ignore'
});
//meta: false, // optional, to prevent adding draft-06 meta-schema

let ajvFormats = require('ajv/lib/compile/formats.js');
ajv.addFormat('uriref', ajvFormats.full['uri-reference']);
ajv.addMetaSchema(require('ajv/lib/refs/json-schema-draft-04.json'));
ajv._refs['http://json-schema.org/schema'] = 'http://json-schema.org/draft-04/schema'; // optional, using unversioned URI is out of spec
let metaSchema = require('ajv/lib/refs/json-schema-v5.json');
ajv.addMetaSchema(metaSchema);
ajv._opts.defaultMeta = metaSchema.id;

const common = require('./common.js');
const jptr = require('reftools/lib/jptr.js');
const walkSchema = require('./walkSchema.js').walkSchema;
const wsGetDefaultState = require('./walkSchema.js').getDefaultState;
const linter = require('./linter/linter.js');

const jsonSchema = require('./schemas/json_v5.json');
const validateMetaSchema = ajv.compile(jsonSchema);
let openapi3Schema = require('./schemas/openapi-3.0.json');
let validateOpenAPI3 = ajv.compile(openapi3Schema);

const yaml = require('yaml');
const should = require('should/as-function');
const maybe = require('call-me-maybe');
let ajv = require('ajv')({
    $data: true,
    allErrors: true,
    verbose: true,
    jsonPointers: true,
    patternGroups: true,
    extendRefs: true // optional, current default is to 'fail', spec behaviour is to 'ignore'
});
//meta: false, // optional, to prevent adding draft-06 meta-schema

let ajvFormats = require('ajv/lib/compile/formats.js');
ajv.addFormat('uriref', ajvFormats.full['uri-reference']);
ajv.addMetaSchema(require('ajv/lib/refs/json-schema-draft-04.json'));
ajv._refs['http://json-schema.org/schema'] = 'http://json-schema.org/draft-04/schema'; // optional, using unversioned URI is out of spec
let metaSchema = require('ajv/lib/refs/json-schema-v5.json');
ajv.addMetaSchema(metaSchema);
ajv._opts.defaultMeta = metaSchema.id;

const bae = require('better-ajv-errors');

class JSONSchemaError extends Error {
  constructor(message) {
    super(message);
    this.name = 'JSONSchemaError';
  }
}

class CLIError extends Error {