Pipeline rules to_map() function still alive?

[xtruthx]

HI,
i just wanted to handle some Fields containing json-formated values like it is described in the following Test:
https://github.com/Graylog2/graylog2-server/blob/master/graylog2-server/src/test/resources/org/graylog/plugins/pipelineprocessor/functions/json.txt

But the actual stable version of Graylog v.2.5 is printing the error in the rule editor that the function to_map() not exists?
If thats the truth than it would be better to delete thoses tests nor?

[xtruthx]

ah sorry wrong repository.and also cleared out.