This member is added by an implicit conversion from TypedSignatureVisitor[T] to
any2stringadd[TypedSignatureVisitor[T]] performed by method any2stringadd in scala.Predef.
This member is added by an implicit conversion from TypedSignatureVisitor[T] to
StringFormat[TypedSignatureVisitor[T]] performed by method StringFormat in scala.Predef.
Helper to abstract over SignatureVisitors that produce a result of type T