code: public ComparisonExpression getLtFilterFromPrefixLike() {
          ExpressionType rangeComparator = ExpressionType.COMPARE_LESSTHAN;
          String comparand = extractAndIncrementLikePatternPrefix();
          return rangeFilterFromPrefixLike(m_left, rangeComparator, comparand);
      }
docs: / Construct the upper bound comparison filter implied by a prefix LIKE comparison.