src/vs/editor/common/services/languagesRegistry.ts/LanguagesRegistry/_initializeFromRegistry
class LanguagesRegistry:	private _initializeFromRegistry(): void {
		this._languages = {};
		this._mimeTypesMap = {};
		this._nameMap = {};
		this._lowercaseNameMap = {};

		clearPlatformLanguageAssociations();
		const desc = (<ILanguageExtensionPoint[]>[]).concat(ModesRegistry.getLanguages()).concat(this._dynamicLanguages);
		this._registerLanguages(desc);
	}