public void storeToIndex(ASTRcdBase b, VarBase idx, VarBase expr) throws ExecuteException {
   throw b.generateExecuteException("ERROR indexing not supported for " + getTypeString());
 }
 public ExecResult executeProc(
     ExecuteContext ctx, ASTRcdBase callersBase, String methodId, VarBase[] args)
     throws ExecuteException {
   throw callersBase.generateExecuteException(
       "ERROR method <" + methodId + "> is not defined for type <" + getTypeString() + ">");
 }
 public VarBase fetchFromIndex(ASTRcdBase b, VarBase idx) throws ExecuteException {
   throw b.generateExecuteException("ERROR indexing not supported for " + getTypeString());
 }