code: public MultiChangeBuilder<PS, SEG, S> deleteText(IndexRange range) {
          return deleteText(range.getStart(), range.getEnd());
      }
docs: Removes a range of text.
  
  @param range The range of text to delete. It must not be null. Its start and end values specify the start
  and end positions within the area.
  
  @see #deleteText(int, int)