Get if inspector field labels are on separate line

When changing the width of the inspector window, there’s a point where certain fields will be drawn with their labels and values on separate lines (like Vector3). I know I saw a property somewhere accessible from a custom editor or property drawer that would be set to true if this was currently happening in the documentation; but now, for the life of me, I can’t find it. Anybody know where it is?

Just found it: EditorGUIUtility.wideMode - true if fields are inlined (label and values on same line), false otherwise.