docs: protected void parseCombineIntegerLists(TokenList tokens) {
          TokenList.Token t = tokens.getFirst();
          if( t == null || t.next == null )
              return;
  
          int numFound = 0;
  
          TokenList.Token start = null;
          TokenList.Token end = null;
  
          while( t != null ) {
              if( t.getType() == Type.VARIABLE && (isVariableInteger(t) ||
                      t.getVariable().getType() == VariableType.INTEGER_SEQUENCE )) {
                  if( numFound == 0 ) {
                      numFound = 1;
                      start = end = t;
                  } else {
                      numFound++;
                      end = t;
                  }
              } else if( numFound > 1 ) {
                  IntegerSequence sequence = new IntegerSequence.Combined(start,end);
                  VariableIntegerSequence varSequence = functions.getManagerTemp().createIntegerSequence(sequence);
                  replaceSequence(tokens, varSequence, start, end);
                  numFound = 0;
              } else {
                  numFound = 0;
              }
              t = t.next;
          }
  
          if( numFound > 1 ) {
              IntegerSequence sequence = new IntegerSequence.Combined(start,end);
              VariableIntegerSequence varSequence = functions.getManagerTemp().createIntegerSequence(sequence);
              replaceSequence(tokens, varSequence, start, end);
          }
      }