why do we need to declare get_config for a float?

[ghsanti]

@keras.saving.register_keras_serializable(package="MyLayers")
class CustomLayer(keras.layers.Layer):
    def __init__(self, factor):
        super().__init__()
        self.factor = factor

    def call(self, x):
        return x * self.factor

    def get_config(self):
        return {"factor": self.factor}

Source

[ghsanti]

The __init__ args of a custom layer must be declared in get config.
If they aren't primitive types must be also serialised.

Config won't be stored otherwise ig.