code: public LocalVariable getLocalVariable(int useLocation, int number) {
          LocalVariableTableAttr table = mOldLocalVariableTable;
          if (table == null) {
              table = mLocalVariableTable;
          }
  
          if (table == null) {
              return null;
          } else {
              return table.getLocalVariable(useLocation, number);
          }
      }
docs: Returns local variable info at the given location, for the given number.
  
  @return null if unknown