src/vs/workbench/api/common/extHostQuickOpen.ts/ExtHostQuickOpenImpl/createInputBox
class ExtHostQuickOpenImpl:		createInputBox(extensionId: ExtensionIdentifier): InputBox {
			const session: ExtHostInputBox = new ExtHostInputBox(extensionId, () => this._sessions.delete(session._id));
			this._sessions.set(session._id, session);
			return session;
		}