def get_function_source(self, function_name: str) -> str:
        """
        Get the Python callable definition reconstructed from Unity Catalog
          for a function by its name. The return of this method is a string
          that contains the callable's definition.

        Args:
            function_name: The name of the function to retrieve from Unity Catalog.

        Returns:
            str: The Python callable definition as a string.
        """

        Get the Python callable definition reconstructed from Unity Catalog
          for a function by its name. The return of this method is a string
          that contains the callable's definition.

        Args:
            function_name: The name of the function to retrieve from Unity Catalog.

        Returns:
            str: The Python callable definition as a string.
        
ai/core/src/unitycatalog/ai/core/base.py