src/vs/workbench/services/textMate/browser/abstractTextMateService.ts/TMTokenization/constructor
class TMTokenization:	constructor(grammar: IGrammar, initialState: StackElement, containsEmbeddedLanguages: boolean) {
		super();
		this._grammar = grammar;
		this._initialState = initialState;
		this._containsEmbeddedLanguages = containsEmbeddedLanguages;
		this._seenLanguages = [];
	}