/**
* accesses the production node for specified pattern; builds pattern matcher if it doesn't exist
* yet
*/
public synchronized Address<? extends Production> accessProductionNode(PQuery query)
throws QueryProcessingException {
final RecipeTraceInfo productionTrace = accessProductionTrace(query);
return (Address<? extends Production>)
headContainer.getProvisioner().getOrCreateNodeByRecipe(productionTrace);
}
