question: tag key , a string . the key must not start with `` aws : '' . concode_field_sep String value concode_elem_sep String key concode_field_sep String getKey concode_elem_sep String getValue concode_elem_sep Tag withValue concode_elem_sep int hashCode concode_elem_sep void setValue concode_elem_sep boolean equals concode_elem_sep Tag clone concode_elem_sep String toString concode_elem_sep void setKey
target: Tag function ( String arg0 ) { setKey ( arg0 ) ; return this ; }