':param src_node_key:
:param dst_node_key:
:param jumpkind:
:param exit_stmt_idx:
:return:'

def _graph_add_edge(self, src_node_key, dst_node_key, **kwargs):

    dst_node = self._graph_get_node(dst_node_key, terminator_for_nonexistent_node=True)
    if (src_node_key is None):
        self.graph.add_node(dst_node)
    else:
        src_node = self._graph_get_node(src_node_key, terminator_for_nonexistent_node=True)
        self.graph.add_edge(src_node, dst_node, **kwargs)
