extensions/merge-conflict/src/documentTracker.ts/DocumentMergeConflictTracker/isPending
class DocumentMergeConflictTracker:	isPending(document: vscode.TextDocument, origin: string): boolean {
		if (!document) {
			return false;
		}

		let key = this.getCacheKey(document);
		if (!key) {
			return false;
		}

		const task = this.cache.get(key);
		if (!task) {
			return false;
		}

		return task.hasOrigin(origin);
	}