Writing gradle plugin with nested extension objects

I am working on a gradle plugin (i dont know groovy, and just started using gradle) that integrates with Asgard (from netflix). I want my extension object to look like this for the user:

asgard {
  url = "http://asgard"
  regions {
    "us-east-1" {
      autoScaling {
        {
          devPhase = "test"
          min = 3
          max = 6
          availabilityZones = ["us-east-1a", "us-east-1b", "us-east-1c"]
          ami = "Base AMI 2013-07-11"
          instanceType = "m3.xlarge"
          securityGroups = ["base", "test-application"]
        }
      }
    }
  }
}

Or something close to that. I have been able to get close to this by making autoScaling a List, but when ever i try to get a property from that class it seems to return a dynamic property and never the value. Here is the below starter plugin:

import org.gradle.internal.reflect.Instantiator

class AsgardPlugin implements Plugin<Project> {
  void apply(Project project) {
    project.extensions.create("asgard", AsgardPluginExtension, project)
    project.asgard.extensions.regions = project.container(AsgardRegion) {String name ->
      AsgardRegion region = project.gradle.services.get(Instantiator).newInstance(AsgardRegion, name)
      assert region instanceof ExtensionAware

      region.extensions.add("autoScaling", project.container(AsgardAutoScaling))

      return region
    }


    project.task('displayConfigs') << {
      if(project.asgard.applicationName == null) project.asgard.applicationName = project.name
      println "Asgard URL $project.asgard.url"
      println "Application name $project.asgard.applicationName"
      println "Runs on regions..."
      project.asgard.regions.each() {region ->
        println "\tRegion $region.name"
        println "\tAutoScaling groups..."
        region.autoScaling.each() {asg ->
          println "\t\tdevPhase $asg"
          println "\t\tdevPhase $asg.devPhase"
          println "\t\tdevPhase $asg.get('devPhase')"
        }
      }
    }
  }
}

class AsgardPluginExtension {
  String url = "http://asgard.sisa.samsung.com"
  String applicationName

  AsgardPluginExtension(Project project) {
    applicationName = project.name
  }
}

class AsgardRegion {
  def String name
  List<AsgardAutoScaling> autoScaling
  AsgardRegion(String name) { this.name = name }
}

class AsgardAutoScaling {
  String devPhase
  int min
  int max
  List<String> availabilityZones
  String ami
  String instanceType
  String sshKey
  List<String> securityGroups
}

When I run the task, this is what I see in the logs:

$  ./gradlew displayConfigs
:displayConfigs
Asgard URL http://asgard
Application name gradle-asgard-plugin
Runs on regions...
        Region us-east-1
        AutoScaling groups...
Creating properties on demand (a.k.a. dynamic properties) has been deprecated and is scheduled to be removed in Gradle 2.0. Please read http://gradle.org/docs/current/dsl/org.gradle.api.plugins.ExtraPropertiesExtension.html for information on the replacement for dynamic properties.
Deprecated dynamic property: "devPhase" on "AsgardRegion_Decorated@65087be0", value: "test".
Deprecated dynamic property: "min" on "AsgardRegion_Decorated@65087be0", value: "3".
Deprecated dynamic property: "max" on "AsgardRegion_Decorated@65087be0", value: "6".
Deprecated dynamic property: "availabilityZones" on "AsgardRegion_Decorated@65087be0", value: "[us-east-1a, us-east-1...".
Deprecated dynamic property: "ami" on "AsgardRegion_Decorated@65087be0", value: "Base AMI 2013-07-11".
Deprecated dynamic property: "instanceType" on "AsgardRegion_Decorated@65087be0", value: "m3.xlarge".
Deprecated dynamic property: "securityGroups" on "AsgardRegion_Decorated@65087be0", value: "[base, test-application]".
                devPhase
                devPhase test
                devPhase AsgardRegion_Decorated@14860315('devPhase')

BUILD SUCCESSFUL

Total time: 1.996 secs

Am I going about this all wrong? If not how can I get the value from the dynamic property (tried get and value, but those don't seem to work).

Thanks for your time reading this.