This member is added by an implicit conversion from ImmutableSortedSetOps[A] to
any2stringadd[ImmutableSortedSetOps[A]] performed by method any2stringadd in scala.Predef.
This member is added by an implicit conversion from ImmutableSortedSetOps[A] to
StringFormat[ImmutableSortedSetOps[A]] performed by method StringFormat in scala.Predef.