question: unregisters a scheme . concode_field_sep ConcurrentHashMap<String,Scheme> registeredSchemes concode_field_sep Scheme getScheme concode_elem_sep Scheme getScheme concode_elem_sep Scheme get concode_elem_sep void setItems concode_elem_sep List<String> getSchemeNames concode_elem_sep Scheme register
target: Scheme function ( String arg0 ) { if ( arg0 == null ) throw new IllegalArgumentException ( "srini_string" ) ; Scheme loc0 = registeredSchemes . remove ( arg0 ) ; return loc0 ; }