src/vs/workbench/services/extensions/common/extensionsRegistry.ts/ExtensionPoint/_handle
class ExtensionPoint:	private _handle(): void {
		if (this._handler === null || this._users === null || this._delta === null) {
			return;
		}

		try {
			this._handler(this._users, this._delta);
		} catch (err) {
			onUnexpectedError(err);
		}
	}