def METHOD_NAME(listOfLFNs):
    req = Request()
    req.RequestName = "MyRequest"
    op = Operation()
    op.Type = "CheckMigration"
    op.TargetSE = "Foo-SE"
    for index, lfn in enumerate(listOfLFNs):
        oFile = File()
        oFile.LFN = lfn
        oFile.Size = index
        oFile.Checksum = "01130a%0d" % index
        oFile.ChecksumType = "adler32"
        op.addFile(oFile)
    req.addOperation(op)
    return req, op