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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_orm_classes_by_table_name_from_base(base: Type) -> Dict[str, Type]: """ Given an SQLAlchemy ORM base class, returns a dictionary whose keys are table names and whose values are ORM classes. If you begin with the proper :class`Base` class, then this should give all tables and ORM classes in use. """

    # noinspection PyUnresolvedReferences
    return {cls.__tablename__: cls for cls in gen_orm_classes_from_base(base)}