BBTK_TEMPLATE_INPUT(StringTo, In,"Input",std::string);
BBTK_TEMPLATE_OUTPUT(StringTo, Out,"Output",T);
BBTK_END_DESCRIBE_TEMPLATE_BLACK_BOX(StringTo);
BBTK_TEMPLATE_INPUT(StringTo, In,"Input",std::string);
BBTK_TEMPLATE_OUTPUT(StringTo, Out,"Output",T);
BBTK_END_DESCRIBE_TEMPLATE_BLACK_BOX(StringTo);