a json string containing up to three key-value pair in json format . for example : \ `` attributes \ '' :{ \ `` string1 \ '' :\ `` string2 \ '' concode_field_sep java.util.Map<String,String> attributes concode_field_sep AttributePayload withAttributes concode_elem_sep AttributePayload addAttributesEntry concode_elem_sep int hashCode concode_elem_sep boolean equals concode_elem_sep AttributePayload clone concode_elem_sep AttributePayload clearAttributesEntries concode_elem_sep String toString concode_elem_sep void setAttributes
java . util . Map < String , String > function ( ) { return attributes ; }