The current DSL support for Promoted Builds plugin does not work with publishers in action{} block. 

freeStyleJob('test-job') {
 properties{
   promotions {
    promotion {
     name('Development')
     icon('star-red')
     conditions {
      manual('testuser')
     }
     actions {
      downstreamParameterized 
      {
       trigger('Downstream Job') {
        condition('SUCCESS')
        parameters {
         predefinedProp('Param1', 'paramValue')
        }
       }
      }
     }
    }
   }
  }
}

Using publisher context of Jenkins Parameterized Trigger plugin under actions{} block of promotions, fails with below error. Can you please help.
ERROR: (script, line 14) No signature of method: javaposse.jobdsl.dsl.helpers.step.DownstreamTriggerContext.condition() is applicable for argument types: (java.lang.String) values: [SUCCESS]