docs: def setCollapsed(self, state):
          """
          Sets whether or not this toolbar is in a collapsed state.
          
          :return     <bool> changed
          """
          if state == self._collapsed:
              return False
          
          self._collapsed = state
          self.refreshButton()
          
          if not self.signalsBlocked():
              self.collapseToggled.emit(state)
          
          return True