set_show_close_button
Description:
Sets whether this header bar shows the standard window decorations, including close, maximize, and minimize.
Parameters:
| this | |
| setting | 
           true to show standard window decorations  | 
      
Sets whether this header bar shows the standard window decorations, including close, maximize, and minimize.
| this | |
| setting | 
           true to show standard window decorations  |