src/vs/workbench/contrib/mergeEditor/browser/view/mergeEditor.ts/MergeEditor/hasFocus
class MergeEditor:	override hasFocus(): boolean {
		for (const { editor } of [this.input1View, this.input2View, this.inputResultView]) {
			if (editor.hasTextFocus()) {
				return true;
			}
		}
		return super.hasFocus();
	}