gets the number of key groups aka the max parallelism aka the max number of subtasks . concode_field_sep int attemptNumber concode_elem_sep int indexOfSubtask concode_elem_sep int numberOfKeyGroups concode_elem_sep String taskName concode_elem_sep int numberOfParallelSubtasks concode_elem_sep String taskNameWithSubtasks concode_field_sep int getNumberOfParallelSubtasks concode_elem_sep String getTaskName concode_elem_sep int getAttemptNumber concode_elem_sep int getIndexOfThisSubtask concode_elem_sep String getTaskNameWithSubtasks
int function ( ) { return numberOfKeyGroups ; }