question: returns the set of indices for vectors in this cluster concode_field_sep IntSet indices concode_elem_sep DoubleVector sumVector concode_elem_sep DoubleVector centroid concode_field_sep void add concode_elem_sep int size concode_elem_sep int hashCode concode_elem_sep boolean equals concode_elem_sep void merge concode_elem_sep DoubleVector sum concode_elem_sep DoubleVector centerOfMass
target: IntSet function ( ) { return indices ; }