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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 graph(self, node_source, edge_source, layout_provider, **kwargs):
        ''' Creates a network graph using the given node, edge and layout provider.

        Args:
            node_source (:class:`~bokeh.models.sources.ColumnDataSource`) : a user-supplied data source
                for the graph nodes. An attempt will be made to convert the object to
                :class:`~bokeh.models.sources.ColumnDataSource` if needed. If none is supplied, one is created
                for the user automatically.

            edge_source (:class:`~bokeh.models.sources.ColumnDataSource`) : a user-supplied data source
                for the graph edges. An attempt will be made to convert the object to
                :class:`~bokeh.models.sources.ColumnDataSource` if needed. If none is supplied, one is created
                for the user automatically.

            layout_provider (:class:`~bokeh.models.graphs.LayoutProvider`) : a ``LayoutProvider`` instance to
                provide the graph coordinates in Cartesian space.

            **kwargs: :ref:`userguide_styling_line_properties` and :ref:`userguide_styling_fill_properties`

        '''
        kw = _graph(node_source, edge_source, **kwargs)
        graph_renderer = GraphRenderer(layout_provider=layout_provider, **kw)
        self.renderers.append(graph_renderer)
        return graph_renderer