This member is added by an implicit conversion from AggregateSymbolTable to
any2stringadd[AggregateSymbolTable] performed by method any2stringadd in scala.Predef.
This member is added by an implicit conversion from AggregateSymbolTable to
StringFormat[AggregateSymbolTable] performed by method StringFormat in scala.Predef.
An aggregate of a list of symbol tables.