def METHOD_NAME(source):
    g1 = NxGraph()
    g1.name = "Graph 1"
    g1.add_node(
        "A",
        **{
            "id": "A",
            "name": "Node A",
            "category": ["biolink:NamedThing"],
            "source": source,
        }
    )
    g1.add_node(
        "B",
        **{
            "id": "B",
            "name": "Node B",
            "category": ["biolink:NamedThing"],
            "source": source,
        }
    )
    g1.add_node(
        "C",
        **{
            "id": "C",
            "name": "Node C",
            "category": ["biolink:NamedThing"],
            "source": source,
        }
    )
    g1.add_edge(
        "B",
        "A",
        **{
            "subject": "B",
            "object": "A",
            "predicate": "biolink:sub_class_of",
            "source": source,
        }
    )
    g2 = NxGraph()
    g2.add_node("A", id="A", **{"source": source})
    g2.add_node("B", id="B", **{"source": source})
    g2.add_node("C", id="C", **{"source": source})
    g2.add_node("D", id="D", **{"source": source})
    g2.add_node("E", id="E", **{"source": source})
    g2.add_node("F", id="F", **{"source": source})
    g2.add_edge(
        "B",
        "A",
        **{
            "subject": "B",
            "object": "A",
            "predicate": "biolink:sub_class_of",
            "source": source,
        }
    )
    g2.add_edge(
        "C",
        "B",
        **{
            "subject": "C",
            "object": "B",
            "predicate": "biolink:sub_class_of",
            "source": source,
        }
    )
    g2.add_edge(
        "D",
        "C",
        **{
            "subject": "D",
            "object": "C",
            "predicate": "biolink:sub_class_of",
            "source": source,
        }
    )
    g2.add_edge(
        "D",
        "A",
        **{
            "subject": "D",
            "object": "A",
            "predicate": "biolink:related_to",
            "source": source,
        }
    )
    g2.add_edge(
        "E",
        "D",
        **{
            "subject": "E",
            "object": "D",
            "predicate": "biolink:sub_class_of",
            "source": source,
        }
    )
    g2.add_edge(
        "F",
        "D",
        **{
            "subject": "F",
            "object": "D",
            "predicate": "biolink:sub_class_of",
            "source": source,
        }
    )
    g3 = NxGraph()
    g3.add_node(
        "A", **{"id": "A", "category": ["biolink:NamedThing"], "source": source}
    )
    g3.add_node(
        "B", **{"id": "B", "category": ["biolink:NamedThing"], "source": source}
    )
    g3.add_edge(
        "A",
        "B",
        **{
            "subject": "A",
            "object": "B",
            "predicate": "biolink:related_to",
            "source": source,
        }
    )
    g4 = NxGraph()
    g4.add_node(
        "A",
        **{
            "id": "A",
            "category": ["biolink:Gene"],
            "provided_by": source,
            "source": source,
        }
    )
    g4.add_node(
        "B",
        **{
            "id": "B",
            "category": ["biolink:Gene"],
            "provided_by": source,
            "source": source,
        }
    )
    g4.add_node(
        "A1",
        **{
            "id": "A1",
            "category": ["biolink:Protein"],
            "provided_by": source,
            "source": source,
        }
    )
    g4.add_node(
        "A2",
        **{
            "id": "A2",
            "category": ["biolink:Protein"],
            "provided_by": source,
            "source": source,
        }
    )
    g4.add_node(
        "B1",
        **{
            "id": "B1",
            "category": ["biolink:Protein"],
            "provided_by": source,
            "source": source,
        }
    )
    g4.add_node(
        "X",
        **{
            "id": "X",
            "category": ["biolink:Drug"],
            "provided_by": source,
            "source": source,
        }
    )
    g4.add_node(
        "Y",
        **{
            "id": "Y",
            "category": ["biolink:Drug"],
            "provided_by": source,
            "source": source,
        }
    )
    g4.add_edge(
        "A",
        "A1",
        **{
            "subject": "A",
            "object": "A1",
            "predicate": "biolink:has_gene_product",
            "provided_by": source,
            "source": source,
        }
    )
    g4.add_edge(
        "A",
        "A2",
        **{
            "subject": "A",
            "object": "A2",
            "predicate": "biolink:has_gene_product",
            "provided_by": source,
            "source": source,
        }
    )
    g4.add_edge(
        "B",
        "B1",
        **{
            "subject": "B",
            "object": "B1",
            "predicate": "biolink:has_gene_product",
            "provided_by": source,
            "source": source,
        }
    )
    g4.add_edge(
        "X",
        "A1",
        **{
            "subject": "X",
            "object": "A1",
            "predicate": "biolink:interacts_with",
            "provided_by": source,
            "source": source,
        }
    )
    g4.add_edge(
        "Y",
        "B",
        **{
            "subject": "Y",
            "object": "B",
            "predicate": "biolink:interacts_with",
            "provided_by": source,
            "source": source,
        }
    )
    return [g1, g2, g3, g4]