public void addSynapseGroup(SynapseGroup group){
  numMembers+=group.size();
  synapseGroupList.add(group);
  group.setParentGroup(this);
}

public void addSynapseGroup ( SynapseGroup group ) { numMembers += group . size ( ) ; synapseGroupList . add ( group ) ; group . setParentGroup ( this ) ; }
add a synapse group .
