private void DrawContent() { using (new FixedRect(_preventExpandingHeight, position.width)) { using (EditorGUILayoutHelper.VerticalBlock(_preventExpandingHeight, DropdownStyle.BackgroundColor, out float contentHeight)) { _selectionTree.Draw(); if (Event.current.type == EventType.Repaint) { _contentHeight = contentHeight; } } EditorGUIHelper.DrawBorders(position.width, position.height, DropdownStyle.BorderColor); } }