code: public static void assertEmpty(String message, DataSource dataSource) throws DBAssertionError {
      DBAssert.stateAssertion(CallInfo.create(message), empty(dataSource));
    }
docs: Assert that the given data source has no rows (error message variant).
  
  <p>A call to this method is equivalent to
  <code>assertState(message, empty(dataSource))</code>.
  
  @param message Assertion error message.
  @param dataSource Data source.
  @throws DBAssertionError if the assertion fails.
  @see #assertState(String,DataSet)
  @see #empty(DataSource)