in src/anthropic/_models.py [0:0]
def is_basemodel(type_: type) -> bool:
"""Returns whether or not the given type is either a `BaseModel` or a union of `BaseModel`"""
if is_union(type_):
for variant in get_args(type_):
if is_basemodel(variant):
return True
return False
return is_basemodel_type(type_)