When defining the parameter keychainPwd() using groovy for describing a job using DSL, it seems with the new version cannot be done. 

When using a string, job DSL processing shows this error:

• Example: -->

keychainPwd('password')

Processing DSL script ios.groovy
ERROR: (unknown source) No signature of method: javaposse.jobdsl.plugin.structs.DescribableContext.keychainPwd() is applicable for argument types: (java.lang.String) values: [password]

Prior to 2.0.12 keychainPwd used a String.

• Example: -->

def keychainPwdVar = hudson.util.Secret.fromString('password')

keychainPwd(keychainPwdVar)

Processing DSL script ios.groovy
ERROR: (unknown source) No signature of method: javaposse.jobdsl.plugin.structs.DescribableContext.keychainPwd() is applicable for argument types: (hudson.util.Secret) values: [password]

In 2.0.12 keychainPwd could use a String (deprecated) or the newone Secret.

I have tested all kind of possible combinations without luck. Not sure if I should define it in other way or this is a kind of bug when usind DSL.