@Override
    public int hashCode() {
        int result = name != null ? name.hashCode() : 0;
        result = 31 * result + (extensionMap != null ? extensionMap.hashCode() : 0);
        return result;
    }
POJO for holding extension meta data
modules/siddhi-doc-gen/src/main/java/io/siddhi/doc/gen/metadata/NamespaceMetaData.java