code: @Deprecated
      public int previous() {
          if(bufferPos>0 || previousNormalize()) {
              int c=buffer.codePointBefore(bufferPos);
              bufferPos-=Character.charCount(c);
              return c;
          } else {
              return DONE;
          }
      }
docs: Return the previous character in the normalized text and decrement
  the iteration position by one.  If the beginning
  of the text has already been reached, {@link #DONE} is returned.
  @return The codepoint as an int
  @deprecated ICU 56
  @hide original deprecated declaration