Open API -> How to reference the external property names/types of Java objects of class path/jar in Request or Response Body YAML Specification

Question

my requirement is to use the properties names and types of the classes which are included in class path java objects.

Basically, $ref will allow us to use the classes which are included in class path like below

1) **YML File** 
paths:
  /users/{id}:
    parameters:
    - name: id
      in: path
      required: true
      description: the user identifier, as userId 
      schema:
        type: string
    get:
      responses:
        '200':
          description: the user being returned
          content:
            application/json:
              schema:
                $ref: "**TESTCALSSOFCLASSPATHORJAR**"
                properties:
                  uuid: # the unique user id
                    type: string
                    format: uuid

2) <plugin>
  <groupId>org.openapitools</groupId>
  <artifactId>openapi-generator-maven-plugin</artifactId>
  <version>${openapi-generator-maven-plugin.version}</version>
  <configuration>
      ... excluded for simplicity
      <importMappings>
          <importMapping>TESTCALSSOFCLASSPATHORJAR=path.to.your.TESTCALSSOFCLASSPATHORJAR</importMapping>        
      </importMappings>
  </configuration>
</plugin>

Is there any way that, I can refer id attribute name from my class path/jar java object??

paths:
  /users/{id}:
    parameters:
    - name: **id** -> I want to get this prop from TESTCALSSOFCLASSPATHORJAR class 
                      i.e.TESTCALSSOFCLASSPATHORJAR.id
      in: path
      required: true
      description: the user identifier, as userId 
      schema:
        type: string
    get:
      responses:
        '200':
          description: the user being returned
          content:
            application/json:
              schema:
                $ref: "**TESTCALSSOFCLASSPATHORJAR**"
                properties:
                  uuid: # the unique user id
                    type: string
                    format: uuid

Referred below documents and searching a lot but didn't find any solution.

https://github.com/OAI/OpenAPI-Specification https://github.com/OpenAPITools/openapi-generator/tree/master/modules/openapi-generator-maven-plugin

Any suggestions would be really appreciated.