def METHOD_NAME(self):
    """Parse node/edge data from CSV files and construct DGL.Graphs"""
    from .csv_dataset_base import (
        DGLGraphConstructor,
        EdgeData,
        GraphData,
        NodeData,
    )
    meta_yaml = self.meta_yaml
    base_dir = self.raw_dir
    node_data = []
    for meta_node in meta_yaml.node_data:
        if meta_node is None:
            continue
        ntype = meta_node.ntype
        data_parser = (
            self.ndata_parser
            if callable(self.ndata_parser)
            else self.ndata_parser.get(ntype, self.default_data_parser)
        )
        ndata = NodeData.load_from_csv(
            meta_node,
            base_dir=base_dir,
            separator=meta_yaml.separator,
            data_parser=data_parser,
        )
        node_data.append(ndata)
    edge_data = []
    for meta_edge in meta_yaml.edge_data:
        if meta_edge is None:
            continue
        etype = tuple(meta_edge.etype)
        data_parser = (
            self.edata_parser
            if callable(self.edata_parser)
            else self.edata_parser.get(etype, self.default_data_parser)
        )
        edata = EdgeData.load_from_csv(
            meta_edge,
            base_dir=base_dir,
            separator=meta_yaml.separator,
            data_parser=data_parser,
        )
        edge_data.append(edata)
    graph_data = None
    if meta_yaml.graph_data is not None:
        meta_graph = meta_yaml.graph_data
        data_parser = (
            self.default_data_parser
            if self.gdata_parser is None
            else self.gdata_parser
        )
        graph_data = GraphData.load_from_csv(
            meta_graph,
            base_dir=base_dir,
            separator=meta_yaml.separator,
            data_parser=data_parser,
        )
    # construct graphs
    self.graphs, self.data = DGLGraphConstructor.construct_graphs(
        node_data, edge_data, graph_data
    )
    if len(self.data) == 1:
        self.labels = list(self.data.values())[0]