public static ToolStripMenuItem add_Menu(this ToolStripMenuItem toolStripMenuItem, string name)
 {
     if (toolStripMenuItem.notNull() && toolStripMenuItem.Owner is MenuStrip)
     {
         return((toolStripMenuItem.Owner as MenuStrip).add_Menu(name));
     }
     "[in add_Menu] toolStripMenuItem.Owner was not a MenuStrip, it was: {0}".error(toolStripMenuItem.typeName());
     return(null);
 }