src/vs/workbench/services/workingCopy/common/workingCopyHistoryTracker.ts/WorkingCopyHistoryTracker/registerListeners
class WorkingCopyHistoryTracker:	private registerListeners() {

		// File Events
		this._register(this.fileService.onDidRunOperation(e => this.onDidRunFileOperation(e)));

		// Working Copy Events
		this._register(this.workingCopyService.onDidChangeContent(workingCopy => this.onDidChangeContent(workingCopy)));
		this._register(this.workingCopyService.onDidSave(e => this.onDidSave(e)));
	}