Documentation for creation of .display files for Google Cloud offering

Question

I am creating a listing/offer for Google Cloud platform marketplace, which contains a schema and a display file for UI. However, I am struggling to find the documentation regarding various components like disk, input fields, network etc. which can guide regarding various types and the restriction I can have.

Like for network selection we have following resource:

  network:
    type: array
    default: [default]
    minItems: 1
    maxItems: 1
    x-googleProperty:
      type: GCE_NETWORK
      gceNetwork:
        allowSharedVpcs: True
        machineTypeProperty: machineType

But I could not get a documentation to find various options available and their usage?

Can someone help me to find appropriate docs.

Thanks.