title: Quickfix contains tag
body: <p>Is there an easy way in Quickfix/J of telling whether a FIX message contains a tag which is located in a repeating group?</p>
  
  <p>I would like to know if a MarketDataSnapshotFullRefresh contains a bid/ask or a Ticker update without processing the message...</p>
  
  <p>i.e. if I could detect the presence of  TickDirection (tag 274) I would know the snapshot is a Ticker update and deal with it appropriately.</p>
  
  <p>The hacky way to do this would be to get the String and look for 274= but was hoping there was a way to do this within the API.</p>
  
  <p>Thxs.</p>