code: public HashMap<String,Object> execute(Execution event, Map<String,Object> args) throws PersistenceException {
          Map<String,Object> r = execute(event.getClass(), args);
          
          if( r == null ) {
              return null;
          }
          if( r instanceof HashMap ) {
              return (HashMap<String,Object>)r;
          }
          else {
              HashMap<String,Object> tmp = new HashMap<String,Object>();
              
              tmp.putAll(r);
              return tmp;
          }
      }
docs: Executes the specified event as part of this transaction.
  @param event the event to execute in this transaction context
  @param args the values to be used by the event
  @return results from the transaction, can be null
  @throws org.dasein.persist.PersistenceException an error occurred
  interacting with the database
  @deprecated use {@link #execute(Class, Map)}