def METHOD_NAME(recording_extractor) -> dict:
    channel_name_array = recording_extractor.get_property("channel_name")
    group_names = [channel.split("-")[0] for channel in channel_name_array]
    unique_group_names = set(group_names)
    group_electrode_numbers = [int(channel.split("-")[1]) for channel in channel_name_array]
    custom_names = list()
    electrodes_metadata = dict(
        group_names=group_names,
        unique_group_names=unique_group_names,
        group_electrode_numbers=group_electrode_numbers,
        custom_names=custom_names,
    )
    return electrodes_metadata