public void enqueueOperation(final String key, final Operation o) {
    checkState();
    StringUtils.validateKey(key, opFact instanceof BinaryOperationFactory);
    addOperation(key, o);
  }
public void enqueueOperation ( final String key , final Operation o ) { checkState ( ) ; StringUtils . validateKey ( key , opFact instanceof BinaryOperationFactory ) ; addOperation ( key , o ) ; }
Enqueue the given {@link Operation} with the used key.

@param key the key to use.
@param o the {@link Operation} to enqueue.