Grails - Combine Joins in the Criteria API Twice

Question

Can I join an association twice in the criteria?

def criteria = User.createCriteria();
def results = criteria.list() {
    childObject1{
      eq("childObjProp","childObjProp1") 
      childObject2 {
          eq("testId", 1 as long) //User input
      }

    }
    childObject1{
      eq("childObjProp","childObjProp1_1") 
      childObject2 {
          eq("testId", 1 as long) //User input
      }

    }
}

Where childObject2data is user input, it may or may not be available. I have a solution SQL. But i needcriteria solution

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