private Node createInstructionNode(final ReilInstruction reilInstruction){
  final Node node=m_internalGraph.createNode();
  m_nodesMap.put(node,new ReilInstructionGraphNode(reilInstruction));
  return node;
}

private Node createInstructionNode ( final ReilInstruction reilInstruction ) { final Node node = m_internalGraph . createNode ( ) ; m_nodesMap . put ( node , new ReilInstructionGraphNode ( reilInstruction ) ) ; return node ; }
creates an instruction graph node
