if( eachElement.isFunction() )
rhsDuct = new FunctionEachStage( flowProcess, eachElement );
else if( eachElement.isFilter() )
rhsDuct = new FilterEachStage( flowProcess, eachElement );
else if( eachElement.isValueAssertion() )
rhsDuct = new ValueAssertionEachStage( flowProcess, eachElement );
else
throw new IllegalStateException( "unknown operation: " + eachElement.getOperation().getClass().getCanonicalName() );
}
else if( element instanceof Every )
{