code: private void computeMaximumContextLength() {
          int max = 0;
          for (int i=0; i<trans.length; ++i) {
              int len = trans[i].getMaximumContextLength();
              if (len > max) {
                  max = len;
              }
          }
          setMaximumContextLength(max);
      }
docs: Compute and set the length of the longest context required by this transliterator.
  This is <em>preceding</em> context.