src/vs/workbench/contrib/mergeEditor/browser/view/mergeEditor.ts/MergeEditor/_applyViewState
class MergeEditor:	private _applyViewState(state: IMergeEditorViewState | undefined) {
		if (!state) {
			return;
		}
		this.inputResultView.editor.restoreViewState(state);
		if (state.input1State) {
			this.input1View.editor.restoreViewState(state.input1State);
		}
		if (state.input2State) {
			this.input2View.editor.restoreViewState(state.input2State);
		}
		if (state.focusIndex >= 0) {
			[this.input1View.editor, this.input2View.editor, this.inputResultView.editor][state.focusIndex].focus();
		}
	}