'Shows details for a security group.
For a full list of available parameters, please refer to the official
API reference:
http://developer.openstack.org/api-ref/networking/v2/index.html#show-security-group'

def show_security_group(self, security_group_id, **fields):

    uri = ('/security-groups/%s' % security_group_id)
    return self.show_resource(uri, **fields)
