build/lib/compilation.ts/MonacoGenerator/_run
class MonacoGenerator:	private _run(): monacodts.IMonacoDeclarationResult | null {
		const r = monacodts.run3(this._declarationResolver);
		if (!r && !this._isWatch) {
			// The build must always be able to generate the monaco.d.ts
			throw new Error(`monaco.d.ts generation error - Cannot continue`);
		}
		return r;
	}