package Ġcom . ust ad mobile . retrie ver Ċ Ċ import Ġcom . ust ad mobile . retrie ver . db . entities . Availability Observer Item Ċ Ċ /** Ċ Ġ* ĠAvailability ĠObserver Ċ Ġ*/ Ċ class ĠAvailability Observer ( ĊĠĠĠ Ġval Ġorigin Urls : ĠList < String >, ĊĠĠĠ Ġval Ġon Availability Changed : ĠOn Availability Changed , ĊĠĠĠ Ġval Ġobserver Mode : ĠInt Ġ= ĠAvailability Observer Item . MODE _ SUM MARY _ ONLY Ċ ) Ċ