There are some cases where I get warnings like this one:
2018-06-11 10:24:27,615 [WARN ] DMN-01006 Unsupported type '_list_' for clause. Values of this clause will not transform into another type. [org.camunda.bpm.dmn] [main] [org.camunda.commons.logging.BaseLogger.logWarn(BaseLogger.java:142)] [{}]
Reason for this message is i.e. a rule, that needs to compare two lists, which is done by the cell containing groovy.
in_list.any{["Value", "AnotherValue"].contains(it)}
The type of that column in_list has to be set one not existing (here list), so that no conversion is made. The skript will not work with the default type ‘string’.
I think, that we need a type ‘RAW’ (or maybe ‘json’) to suppress that warning and to tell the engine to explicitly not convert that value.