docstr: Remove this dock from the DockArea it lives inside.
docstr_tok: ["Remove","this","dock","from","the","DockArea","it","lives","inside","."]
code: def close(self):
      """Remove this dock from the DockArea it lives inside."""
      if self._container is None:
          warnings.warn(
              f"Cannot close dock {self} because it is not open.",
              RuntimeWarning,
              stacklevel=2,
          )
          return
  
      self.setParent(None)
      QtWidgets.QLabel.close(self.label)
      self.label.setParent(None)
      self._container.apoptose()
      self._container = None
      self.sigClosed.emit(self)
  
imports: import warnings
  from ..Qt import QtCore, QtGui, QtWidgets
  from ..widgets.VerticalLabel import VerticalLabel
  from .DockDrop import DockDrop
label_desc: Use image node_id 19 for calling the Dock obj's underlying member method code with example usage: obj.close() without return types