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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def update_buffer(self, treebuffer, transfer_objects=False):
 """ Merge items from a TreeBuffer into this Tree's TreeBuffer Parameters buffer : rootpy.tree.buffer.TreeBuffer The TreeBuffer to merge into this Tree's buffer transfer_objects : bool, optional (default=False) If True then all objects and collections on the input buffer will be transferred to this Tree's buffer. """

        self._buffer.update(treebuffer)
        if transfer_objects:
            self._buffer.set_objects(treebuffer)