Customize `GetImplementingThings` service

I am new to ThingWorx and want to get some practical flavour of implementing services on this example.

I have such data model:

Thing: Car(Infotable) has Sensor(Infotable)

I want to have service of CarTemplate that will return all implemented Cars and instead of Sensor's Object it will return Sensor's 'name' property.

What I have now:

"Car1Name" |  SensorObject

What I want:

"Car1Name" | "Accelerator1Name"

Please, help me to make it happens.

I asked this question also at stackoverflow: https://stackoverflow.com/questions/36721805/thingworx-customize-getimplementingthings-service