Error parsing Parameters in RAML 1.0

[nramanathan79]

When parsing valid 1.0 RAML with passing parameters, there is a parser error E.g.

Resource type library with parameters defined

#%RAML 1.0 Library
usage: Standard resourceTypes
uses:
  standardTraits: ../traits/standardTraits.raml
  standardDataTypes: ../libraries/standardDataTypes.raml

resourceTypes:
  base:
    get:
      responses:
        200:
          body:
            application/json:
              type: <<itemType>>

  read-only-collection:
    type: { base: { itemType : <<itemType>> } }
    get:
      responses:
        200:
          body:
            application/json:
              type: <<itemType>>[]
              example: <<exampleCollection>>

And in the api RAML

/marketingPlans:
  description: Return list of Marketing Plans
  displayName: List of Marketing Plans
  type:
    standardResourceTypes.read-only-collection:
      itemType : planType.Plan-Paginated
      exampleCollection: !include examples/plans.json

Getting a parser error saying Invalid Element { type: <<itemType>> } which is a parameter that is passed in.

Aha! Link: https://mulesoft-roadmap.aha.io/features/APIRAML-103