src/vs/editor/common/textModelEvents.ts/ModelRawContentChangedEvent/containsEvent
class ModelRawContentChangedEvent:	public containsEvent(type: RawContentChangedType): boolean {
		for (let i = 0, len = this.changes.length; i < len; i++) {
			const change = this.changes[i];
			if (change.changeType === type) {
				return true;
			}
		}
		return false;
	}