docs: def show_colormap(cls, names=[], N=10, show=True, *args, **kwargs):
          """Show a colormap dialog
  
          Parameters
          ----------
          %(show_colormaps.parameters.no_use_qt)s"""
          names = safe_list(names)
          obj = cls(names, N, *args, **kwargs)
          vbox = obj.layout()
          buttons = QDialogButtonBox(QDialogButtonBox.Close, parent=obj)
          buttons.rejected.connect(obj.close)
          vbox.addWidget(buttons)
          if show:
              obj.show()
          return obj