code: public SimpleMDAGNode transition(SimpleMDAGNode[] mdagDataArray, char letter)
      {
          SimpleMDAGNode targetNode = null;
          int offset = binarySearch(mdagDataArray, letter);
          if (offset >= 0)
          {
              targetNode = mdagDataArray[offset];
          }
          /////
  
          return targetNode;
      }
docs: Follows an outgoing _transition from this node.
  
  @param mdagDataArray the array of SimpleMDAGNodes containing this node
  @param letter        the char representation of the desired _transition's label
  @return the SimpleMDAGNode that is the target of the _transition labeled with {@code letter},
  or null if there is no such labeled _transition from this node