Convert highly specific ops

def convert_custom(net, node, module, builder):
    """Convert highly specific ops"""
    input_name, output_name = _get_input_output_name(net, node)
    name = node['name']
    param = _get_attr(node)
    if param['op_type'] == 'special-darknet-maxpool':
        _add_pooling.add_pooling_with_padding_types(
            builder=builder,
            name=name,
            height=2,
            width=2,
            stride_height=1,
            stride_width=1,
            layer_type='MAX',
            padding_type='SAME',
            is_global=False,
            same_padding_asymmetry_mode='BOTTOM_RIGHT_HEAVY',
            input_name=input_name,
            output_name=output_name
        )
    else:
        raise TypeError("MXNet layer of type Custom is not supported.")