src/vs/editor/contrib/anchorSelect/browser/anchorSelect.ts/SetSelectionAnchor/constructor
class SetSelectionAnchor:	constructor() {
		super({
			id: 'editor.action.setSelectionAnchor',
			label: localize('setSelectionAnchor', "Set Selection Anchor"),
			alias: 'Set Selection Anchor',
			precondition: undefined,
			kbOpts: {
				kbExpr: EditorContextKeys.editorTextFocus,
				primary: KeyChord(KeyMod.CtrlCmd | KeyCode.KeyK, KeyMod.CtrlCmd | KeyCode.KeyB),
				weight: KeybindingWeight.EditorContrib
			}
		});
	}