build/lib/monaco-api.ts/TypeScriptLanguageServiceHost/getScriptSnapshot
class TypeScriptLanguageServiceHost:	getScriptSnapshot(fileName: string): ts.IScriptSnapshot {
		if (this._files.hasOwnProperty(fileName)) {
			return this._ts.ScriptSnapshot.fromString(this._files[fileName]);
		} else if (this._libs.hasOwnProperty(fileName)) {
			return this._ts.ScriptSnapshot.fromString(this._libs[fileName]);
		} else {
			return this._ts.ScriptSnapshot.fromString('');
		}
	}