def __init__(self, level, block_fn, input_offsets, is_output):
    self.level = level
    self.block_fn = block_fn
    self.input_offsets = input_offsets
    self.is_output = is_output
def __init__(self, level, block_fn, input_offsets, is_output):
    self.level = level
    self.block_fn = block_fn
    self.input_offsets = input_offsets
    self.is_output = is_output