code: public void removeNode(int n)
    {
  
      if (!m_mutable)
        throw new RuntimeException(XSLMessages.createXPATHMessage(XPATHErrorResources.ER_NODESETDTM_NOT_MUTABLE, null)); //"This NodeSetDTM is not mutable!");
  
      this.removeElement(n);
    }
docs: Remove a node.
  
  @param n Node to be added
  @throws RuntimeException thrown if this NodeSetDTM is not of
  a mutable type.