code: public void removeLine(final Line line)
      {
          if (line.previous == null)
          {
              this.lines = line.next;
          }
          else
          {
              line.previous.next = line.next;
          }
          if (line.next == null)
          {
              this.lineTail = line.previous;
          }
          else
          {
              line.next.previous = line.previous;
          }
          line.previous = line.next = null;
      }
docs: Removes the given line from this block.
  
  @param line
  Line to remove.