Yes Sel,You can find all deprecated class,Interface of org.apache.sling.common.json package in AEM 6.3.org.apache.sling.commons.json ("The Adobe AEM Quickstart and Web Application.") IN place of this You can use GsonJava POJO to JSON using Gson (com.google.gson.Gson) - CoderMagnet - JAVA JCR AEM Sig...