src/vs/workbench/contrib/preferences/browser/keybindingsEditorContribution.ts/DefineKeybindingCommand/constructor
class DefineKeybindingCommand:	constructor() {
		super({
			id: DefineKeybindingCommand.ID,
			precondition: ContextKeyExpr.and(EditorContextKeys.writable, EditorContextKeys.languageId.isEqualTo('jsonc')),
			kbOpts: {
				kbExpr: EditorContextKeys.editorTextFocus,
				primary: KeyChord(KeyMod.CtrlCmd | KeyCode.KEY_K, KeyMod.CtrlCmd | KeyCode.KEY_K),
				weight: KeybindingWeight.EditorContrib
			}
		});
	}