def post_graph(path, params)
      client(path).post_graph(service_name(path), section_name(path), graph_name(path), params)
    end
def post_graph(path, params)
      client(path).post_graph(service_name(path), section_name(path), graph_name(path), params)
    end
Post parameters to a graph, POST /api/:path
 @param [String] path
 @param [Hash] params The POST parameters. See #get_graph