keras/src/utils/module_utils.py/LazyModule/initialize
class LazyModule:    def initialize(self):
        try:
            self.module = importlib.import_module(self.name)
        except ImportError:
            raise ImportError(
                f"This requires the {self.name} module. "
                f"You can install it via `pip install {self.pip_name}`"
            )