code: int searchAll(
      SearchComparator  comp,
      Object            searchKey)
    {
      int idx = -1;
      if (comp.type() == SearchComparator.EQ)
        idx = findEqual(comp, 0, rightMostIndex(), searchKey);
      else
        idx = findGreater(comp, 0, rightMostIndex(), searchKey);
  
      return idx;
    }
docs: Search the whole node.
  
  <p>Look in the whole node to find an index entry that is one of</p>
  <ol>
  <li>an exact match for the supplied key,
  <li>greater than the supplied key, or
  <li>greater than or equal to the supplied key.
  </ol>
  <p>The type of the supplied SearchComparator indicate which of the
  above three conditions apply</p>.
  
  @param comp The SearchComparator to use for the key comparisons.
  @param searchKey The key to find.
  
  @return Index of key within node.  -1 if key does not exist.