This member is added by an implicit conversion from UnionType[Types] to
any2stringadd[UnionType[Types]] performed by method any2stringadd in scala.Predef.
This member is added by an implicit conversion from UnionType[Types] to
StringFormat[UnionType[Types]] performed by method StringFormat in scala.Predef.
This allows to restrict the handling of family to only some subtypes (not required to be sealed in this case).
to restrict the subtypes to handle
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