private void DrawCenter()
 {
     GUILayout.BeginVertical(GUILayout.ExpandWidth(true));
     centerPanel.Draw();
     GUILayout.EndVertical();
 }
 private void DrawRightPanel()
 {
     GUILayout.BeginVertical(GUILayout.Width(300), GUILayout.ExpandWidth(true));
     rightPanel.Draw();
     GUILayout.EndVertical();
 }
 private void DrawLeftPanel()
 {
     GUILayout.BeginVertical(GUILayout.Width(200));
     leftPanel.Draw();
     GUILayout.EndVertical();
 }