How to use the webpack-sources.OriginalSource function in webpack-sources

import test from 'ava';
import uglify from 'uglify-js';
import sinon from 'sinon';
import tmpFile from '../../lib/tmp-file';
import cache from '../../lib/cache';
import { RawSource, OriginalSource } from 'webpack-sources';

const codeSource = 'function  test   ()    {   void(0); }';
const rawSource = new RawSource(codeSource);
const originalSource = new OriginalSource(codeSource);
const sourceAndMap = rawSource.sourceAndMap();
const options = {
  uglifyJS: { },
};
const originalContent = JSON.stringify({
  source: sourceAndMap.source,
  map: sourceAndMap.map,
  options,
});
const minifiedContent = uglify.minify(codeSource, { });

// ava is multi process and uses process.on,
// so we stub it to be sure it doesn't get in the way.
const stubbedOn = sinon.stub(process, 'on');
const worker = require('../../lib/worker');
const { minify, processMessage } = worker;

render(hash, chunk, moduleTemplate, dependencyTemplates) {
		const buf = [];
		buf.push(this.applyPluginsWaterfall("bootstrap", "", chunk, hash, moduleTemplate, dependencyTemplates));
		buf.push(this.applyPluginsWaterfall("local-vars", "", chunk, hash));
		buf.push("");
		buf.push("// The require function");
		buf.push(`function ${this.requireFn}(moduleId) {`);
		buf.push(this.indent(this.applyPluginsWaterfall("require", "", chunk, hash)));
		buf.push("}");
		buf.push("");
		buf.push(this.asString(this.applyPluginsWaterfall("require-extensions", "", chunk, hash)));
		buf.push("");
		buf.push(this.asString(this.applyPluginsWaterfall("startup", "", chunk, hash)));
		let source = this.applyPluginsWaterfall("render", new OriginalSource(this.prefix(buf, " \t") + "\n", `webpack/bootstrap ${hash}`), chunk, hash, moduleTemplate, dependencyTemplates);
		if(chunk.hasEntryModule()) {
			source = this.applyPluginsWaterfall("render-with-entry", source, chunk, hash);
		}
		if(!source) throw new Error("Compiler error: MainTemplate plugin 'render' should return something");
		chunk.rendered = true;
		return new ConcatSource(source, ";");
	}

render(hash, chunk, moduleTemplate, dependencyTemplates) {
		const buf = this.renderBootstrap(
			hash,
			chunk,
			moduleTemplate,
			dependencyTemplates
		);
		let source = this.hooks.render.call(
			new OriginalSource(
				Template.prefix(buf, " \t") + "\n",
				"webpack/bootstrap"
			),
			chunk,
			hash,
			moduleTemplate,
			dependencyTemplates
		);
		if (chunk.hasEntryModule()) {
			source = this.hooks.renderWithEntry.call(source, chunk, hash);
		}
		if (!source) {
			throw new Error(
				"Compiler error: MainTemplate plugin 'render' should return something"
			);
		}

}

			let amdFactory;
			if(optionalExternals.length > 0) {
				const wrapperArguments = externalsArguments(requiredExternals);
				const factoryArguments = requiredExternals.length > 0 ?
					externalsArguments(requiredExternals) + ", " + externalsRootArray(optionalExternals) :
					externalsRootArray(optionalExternals);
				amdFactory = `function webpackLoadOptionalExternalModuleAmd(${wrapperArguments}) {\n` +
					`			return factory(${factoryArguments});\n` +
					"		}";
			} else {
				amdFactory = "factory";
			}

			return new ConcatSource(new OriginalSource(
				"(function webpackUniversalModuleDefinition(root, factory) {\n" +
				(this.auxiliaryComment &&
					typeof this.auxiliaryComment === "string" ?
					"   //" + this.auxiliaryComment + "\n" :
					this.auxiliaryComment.commonjs2 ?
					"   //" + this.auxiliaryComment.commonjs2 + "\n" :
					""
				) +
				"	if(typeof exports === 'object' && typeof module === 'object')\n" +
				"		module.exports = factory(" + externalsRequireArray("commonjs2") + ");\n" +
				(this.auxiliaryComment &&
					typeof this.auxiliaryComment === "string" ?
					"   //" + this.auxiliaryComment + "\n" :
					this.auxiliaryComment.amd ?
					"   //" + this.auxiliaryComment.amd + "\n" :
					""

getSource(sourceString) {
		if(this.useSourceMap) {
			return new OriginalSource(sourceString, this.identifier());
		}

		return new RawSource(sourceString);
	}

getSource(sourceString) {
		if(this.useSourceMap) {
			return new OriginalSource(sourceString, this.identifier());
		}
		return new RawSource(sourceString);
	}

createSourceForAsset(name, content, sourceMap) {
		if (!sourceMap) {
			return new RawSource(content);
		}

		if (typeof sourceMap === "string") {
			return new OriginalSource(content, sourceMap);
		}

		return new SourceMapSource(content, name, sourceMap);
	}

getSource(sourceString) {
		if(this.useSourceMap) {
			return new OriginalSource(sourceString, this.identifier());
		}
		return new RawSource(sourceString);
	}

return new LineToLineMappedSource(
				source,
				identifier,
				asString(resourceBuffer)
			);
		}

		if (this.useSourceMap && sourceMap) {
			return new SourceMapSource(source, identifier, sourceMap);
		}

		if (Buffer.isBuffer(source)) {
			return new RawSource(source);
		}

		return new OriginalSource(source, identifier);
	}