extensions/references-view/src/calls/model.ts/CallsTreeInput/constructor
class CallsTreeInput:	constructor(
		readonly location: vscode.Location,
		readonly direction: CallsDirection,
	) {
		this.title = direction === CallsDirection.Incoming
			? vscode.l10n.t('Callers Of')
			: vscode.l10n.t('Calls From');
	}