Copy a subgraph. Args: sgv: the source subgraph-view. This argument is converted to a subgraph using the same rules than the function subgraph.make_view. dst_graph: the destination graph. dst_scope: the destination scope. src_scope: the source scope. reuse_dst_scope: if
(sgv, dst_graph=None, dst_scope="", src_scope="",
reuse_dst_scope=False)
source not stored for this graph (policy: none)