question: get the registrar for the specified protocol identifier . concode_field_sep RegistrarMapper FACTORY concode_elem_sep Map registrarMap concode_field_sep RegistrarMapper getFactory concode_elem_sep void addRegistrar concode_elem_sep void removeRegistrar
target: Registrar function ( final String arg0 ) { final Object loc0 ; synchronized ( registrarMap ) { loc0 = registrarMap . get ( arg0 ) ; } return ( Registrar ) loc0 ; }