keras/src/layers/reshaping/cropping1d.py/Cropping1D/__init__
class Cropping1D:    def __init__(self, cropping=(1, 1), **kwargs):
        super().__init__(**kwargs)
        self.cropping = argument_validation.standardize_tuple(
            cropping, 2, "cropping", allow_zero=True
        )
        self.input_spec = InputSpec(ndim=3)