CV_TYPE_NAME_GRAPH 4456 modules/core/src/persistence.cpp     cvStartWriteStruct( fs, name, CV_NODE_MAP, CV_TYPE_NAME_GRAPH );
CV_TYPE_NAME_GRAPH 4794 modules/core/src/persistence.cpp CvType seq_graph_type( CV_TYPE_NAME_GRAPH, icvIsGraph, icvReleaseGraph,