human
I wrote the below code

    if (hasattr(context, 'auth_token') and context.auth_token):
        return True
    def _is_image_public(image):
        if hasattr(image, 'visibility'):
            return (str(image.visibility).lower() == 'public')
        else:
            return image.is_public
    if (context.is_admin or _is_image_public(image)):
        return True
    properties = image.properties
    if (context.project_id and ('owner_id' in properties)):
        return (str(properties['owner_id']) == str(context.project_id))
    if (context.project_id and ('project_id' in properties)):
        return (str(properties['project_id']) == str(context.project_id))
    try:
        user_id = properties['user_id']
    except KeyError:
        return False
    return (str(user_id) == str(context.user_id))

What's a good function header?

=====
Here's a good function header?
assistant
#Here's a good function header.

def _is_image_available(context, image):