question: public boolean render ( InternalContextAdapter context , Writer writer ) throws IOException , MethodInvocationException { if ( referenceType == RUNT ) { writer . write ( rootString ) ; return true ; } Object value = execute ( null , context ) ; if ( escaped ) { if ( value == null ) { writer . write ( escPrefix ) ; writer . write ( "\\" ) ; writer . write ( nullString ) ; } else { writer . write ( escPrefix ) ; writer . write ( nullString ) ; } return true ; } EventCartridge ec = context . getEventCartridge ( ) ; if ( ec != null ) { value = ec . referenceInsert ( literal , value ) ; } if ( value == null ) { writer . write ( escPrefix ) ; writer . write ( escPrefix ) ; writer . write ( morePrefix ) ; writer . write ( nullString ) ; if ( referenceType != QUIET_REFERENCE && rsvc . getBoolean ( RuntimeConstants . RUNTIME_LOG_REFERENCE_LOG_INVALID , true ) ) { rsvc . warn ( new ReferenceException ( "reference : template = " + context . getCurrentTemplateName ( ) , this ) ) ; } return true ; } else { writer . write ( escPrefix ) ; writer . write ( morePrefix ) ; writer . write ( value . toString ( ) ) ; return true ; } }
target:  gets the value of the reference and outputs it to the writer.