Python API - copying nodes from one shader graph to another

Currently in Python API there is no option to just copy some nodes from one shader graph to another. The only way to do that I've found is by doing some tomfoolery with context overriding and basically emulating user using bpy.ops.node.clipboard_copy and bpy.ops.node.clipboard_paste . Which seems a bit unreliable and might break at some point, not to mention polluting clipboard.

It would be nice to have a simple way to copy some parts of graph with links or the entire graph from python API.

Current workaround from here - blender.stackexchange.com/questions/123887/how-to-copy-nodes-and-their-links-from-one-node-tree-material-to-another-in-py/294548 :

def get_shader_editor_context():
    for screen in bpy.data.screens:
        for area in screen.areas:
            if area.type == "NODE_EDITOR":
                for space in area.spaces:
                    if space.tree_type == "ShaderNodeTree":
                        context_override = {"area": area, "space": space, "screen": screen}
                        return context_override

def copy_node_graph_to_active_object(material):
    temp_override = get_shader_editor_context()
    old_material = bpy.context.object.active_material
    new_material = material

    # remove all nodes from the current material
    for n in old_material.node_tree.nodes[:]:
        old_material.node_tree.nodes.remove(n)

    # change current material and make other window's shader editor is updated
    bpy.context.object.active_material = new_material
    temp_override['space'].node_tree = new_material.node_tree

    # select all nodes and copy them to clipboard
    for node in new_material.node_tree.nodes:
        node.select = True
    bpy.ops.node.clipboard_copy(temp_override)

    # back to original material
    bpy.context.object.active_material = old_material
    temp_override['space'].node_tree = old_material.node_tree
    bpy.ops.node.clipboard_paste(temp_override, offset=(0,0))