def verify_fs(*args: Signal, **kwargs: Signal):
pairs = []
for name, child in kwargs.items():
pairs.append((name, child.get_fs()))
for idx, child in enumerate(args):
pairs.append((idx, child.get_fs()))
if len(set(map(lambda pair: pair[1], pairs))) > 1:
raise ValueError(f"Child signals do not have matching FS: {pairs}")
