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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 BuildTypeDescriptor(self, value_cls):
 """Renders metadata of a given value class. Args: value_cls: Metadata of this class will be rendered. This class has to be (or to be a subclass of) a self.value_class (i.e. a class that this renderer is capable of rendering). Returns: Dictionary with class metadata. """

    result = ApiRDFValueDescriptor(
        name=value_cls.__name__,
        parents=[klass.__name__ for klass in value_cls.__mro__],
        doc=value_cls.__doc__ or "",
        kind="PRIMITIVE")

    result.default = self.BuildDefaultValue(value_cls)

    return result