code: public void copyFrom(TextImage source, int startRowIndex, int rows, int startColumnIndex, int columns, int destinationRowOffset, int destinationColumnOffset) {
          source.copyTo(backend, startRowIndex, rows, startColumnIndex, columns, destinationRowOffset, destinationColumnOffset);
      }
docs: Copies the content from a TextImage into this buffer.
  @param source Source to copy content from
  @param startRowIndex Which row in the source image to start copying from
  @param rows How many rows to copy
  @param startColumnIndex Which column in the source image to start copying from
  @param columns How many columns to copy
  @param destinationRowOffset The row offset in this buffer of where to place the copied content
  @param destinationColumnOffset The column offset in this buffer of where to place the copied content