def METHOD_NAME(self):
    if self.n:
        #: Property identification number. (Integer > 0)
        self.property_id = array(self._property_id)
        #: Bi damp property value. (Real)
        self.B = array(self._B)
        #: Damping coefficient, . See Remarks 5. and 6. (Real)
        #: To obtain the damping coefficient GE, multiply the
        #: critical damping ratio c/c0 by 2.0.
        self.ge = array(self._ge)
        #: Stress coefficient. (Real)
        self.s = array(self._s)
        self.n = len(self.B)
        i = self.property_id.argsort()
        self.property_id = self.property_id[i]
        self.B = self.B[i]
        self.ge = self.ge[i]
        self.s = self.s[i]
        self._property_id = []
        self._B = []
        self._ge = []
        self._s = []
    else:
        self.property_id = array([], dtype='int32')