question: create a group of groups for use as an id concode_field_sep String sourceField concode_elem_sep String name concode_elem_sep Accumulator accumulator concode_field_sep Accumulator average concode_elem_sep Accumulator getAccumulator concode_elem_sep String getName concode_elem_sep Accumulator min concode_elem_sep Accumulator last concode_elem_sep Accumulator max concode_elem_sep Accumulator sum concode_elem_sep String getSourceField concode_elem_sep Group grouping concode_elem_sep Group grouping concode_elem_sep Group grouping concode_elem_sep Accumulator push concode_elem_sep Accumulator first concode_elem_sep Accumulator addToSet
target: List < Group > function ( final Group ... arg0 ) { return Arrays . asList ( arg0 ) ; }