def grant_role(self, role_name, principal_name, principal_type, grantor, grantorType, grant_option):
    """
    Parameters:
     - role_name
     - principal_name
     - principal_type
     - grantor
     - grantorType
     - grant_option
    """
    self.send_grant_role(role_name, principal_name, principal_type, grantor, grantorType, grant_option)
    return self.recv_grant_role()