docs: SymbolTable[] getImportedTables()
      {
          int count = myImports.length - 1; // we don't include system symtab
          SymbolTable[] imports = new SymbolTable[count];
          if (count > 0)
          {
              // defensive copy
              System.arraycopy(myImports, 1, imports, 0, count);
          }
          return imports;
      }