Is allOf not working for schemas?

[millennIumAMbiguity]

In this simplified example, only SchemaB, SchemaD, and SchemaE will be part of the exported code.
What can I do to make it include all parts of the code?

openapi: "3.0.3"
components:
  schemas:
   SchemaA:
      type: object
      allOf:
        - $ref: "#/components/schemas/SchemaB"
        - $ref: "#/components/schemas/SchemaC"
        - properties:
            state1:
              $ref: "#/components/schemas/SchemaD"
            state2:
              $ref: "#/components/schemas/SchemaE"