code: def remove_sources(self, sources):
          
          if self.unmixing_ is None or self.mixing_ is None:
              raise RuntimeError("No sources available (run do_mvarica first)")
          self.mixing_ = np.delete(self.mixing_, sources, 0)
          self.unmixing_ = np.delete(self.unmixing_, sources, 1)
          if self.activations_ is not None:
              self.activations_ = np.delete(self.activations_, sources, 1)
          self.var_model_ = None
          self.var_cov_ = None
          self.connectivity_ = None
          self.mixmaps_ = []
          self.unmixmaps_ = []
          return self
docs: Remove sources from the decomposition.
  
          This function removes sources from the decomposition. Doing so invalidates currently fitted VAR models and
          connectivity estimates.
  
          Parameters
          ----------
          sources : {slice, int, array of ints}
              Indices of components to remove.
  
          Returns
          -------
          self : Workspace
              The Workspace object.
  
          Raises
          ------
          RuntimeError
              If the :class:`Workspace` instance does not contain a source decomposition.