code: def remove(self, item):
          '''Remove *item* from collection.
  
          raise :py:class:`~clique.error.CollectionError` if *item* cannot be
          removed from the collection.
  
          '''
          match = self.match(item)
          if match is None:
              raise clique.error.CollectionError(
                  'Item not present in collection.'
              )
  
          index = int(match.group('index'))
          try:
              self.indexes.remove(index)
          except KeyError:
              raise clique.error.CollectionError(
                  'Item not present in collection.'
              f remove(self, item):
          '''Remove *item* from collection.
  
          raise :py:class:`~clique.error.CollectionError` if *item* cannot be
          removed from the collection.
  
          '''
          match = self.match(item)
          if match is None:
              raise clique.error.CollectionError(
                  'Item not present in collection.'
              )
  
          index = int(match.group('index'))
          try:
              self.indexes.remove(index)
          except KeyError:
              raise clique.error.CollectionError(
                  'Item not present in collection.'
              )
docs: Remove *item* from collection.
  
          raise :py:class:`~clique.error.CollectionError` if *item* cannot be
          removed from the collection.