docs: protected void flowIntoRootNode(GrowQueue_I32 regionMemberCount) {
  		rootID.resize(regionMemberCount.size);
  		int count = 0;
  
  		for( int i = 0; i < mergeList.size; i++ ) {
  			int p = mergeList.data[i];
  
  			// see if it is a root note
  			if( p == i ) {
  				// mark the root nodes new ID
  				rootID.data[i] = count++;
  				continue;
  			}
  
  			// traverse down until it finds the root note
  			int gp = mergeList.data[p];
  			while( gp != p ) {
  				p = gp;
  				gp = mergeList.data[p];
  			}
  
  			// update the count and change this node into the root node
  			regionMemberCount.data[p] += regionMemberCount.data[i];
  			mergeList.data[i] = p;
  		}
  	}