How to get Fulfill Line attributes in OM Extensions...?

Summary:

Need to read & use a couple of Fulfill Line Attributes on the OM Extension.

Tried calling them how we do with Lines, but getting errors! So how do we call & get Fulfill Line attributes..?

The code snippet below is how we usually work with Line attributes, but not able to determine how to do the same with Fulfill Lines!

Can we simply do something like header.getAttribute ("FulfillLines") !!?

Content (please ensure you mask any confidential information):

def lines = header.getAttribute("Lines");


while(lines.hasNext())

{
def line = lines.next();


def Attribute1 = line.getAttribute("AttributeXyz");

}

Version (include the version you are using, if applicable):