src/vs/workbench/browser/parts/editor/tabsTitleControl.ts/TabsTitleControl/pinEditor
class TabsTitleControl:	pinEditor(editor: IEditorInput): void {
		this.withTab(editor, (editor, index, tabContainer, tabLabelWidget, tabLabel) => this.redrawTabLabel(editor, index, tabContainer, tabLabelWidget, tabLabel));
	}