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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 enum_to_yaml(cls: Type[T_EnumToYAML], representer: Representer, data: T_EnumToYAML) -> ruamel.yaml.nodes.ScalarNode: """ Encodes YAML representation. This is a mixin method for writing enum values to YAML. It needs to be added to the enum as a classmethod. See the module docstring for further information on this approach and how to implement it. This method writes whatever is used in the string representation of the YAML value. Usually, this will be the unique name of the enumeration value. If the name is used, the corresponding ``EnumFromYAML`` mixin can be used to recreate the value. If the name isn't used, more care may be necessary, so a ``from_yaml`` method for that particular enumeration may be necessary. Note: This method assumes that the name of the enumeration value should be stored as a scalar node. Args: representer: Representation from YAML. data: Enumeration value to be encoded. Returns: Scalar representation of the name of the enumeration value. """

    return representer.represent_scalar(
        f"!{cls.__name__}",
        f"{str(data)}"
    )