set(graph_headers
        ${header_path}/lzhlib/graph/directed_graph.hpp
        ${header_path}/lzhlib/graph/edge.hpp
        ${header_path}/lzhlib/graph/edge_id.hpp
        ${header_path}/lzhlib/graph/graph.hpp
        ${header_path}/lzhlib/graph/graph_base.hpp
        ${header_path}/lzhlib/graph/undirected_graph.hpp
        ${header_path}/lzhlib/graph/vertex.hpp
        ${header_path}/lzhlib/graph/vertex_id.hpp
        )