code: public boolean setLinesDeleted(String linesDeletedStr) {
      try {
        this.linesDeleted = Integer.parseInt(linesDeletedStr);
        return true;
      } catch (NumberFormatException e) {
        return false;
      }
    }
docs: Sets the number of lines deleted in a commit.
  
  @param linesDeletedStr
  The number of lines deleted in <code>String</code> format.
  @return True if the <code>linesDeletedStr</code> parameter is a <code>String</code>
  representing a number. False if the <code>String</code> does not contain a parsable
  integer.