internal MapJoiner(Joiner joiner, string keyValueSeparator)
{
this.joiner = joiner; // only "this" is ever passed, so don't checkNotNull
this.keyValueSeparator = CheckNotNull(keyValueSeparator);
}
internal UseForNullJoiner(Joiner prototype, string nullText) : base(prototype.separator)
{
this.nullText = nullText;
}
internal SkipNullsJoiner(Joiner prototype) : base(prototype.separator)
{
}