Include fields/projections from external schema in a graphql projections

Question

I have a below type defined in my graphql schema in a maven project A

type Rule {
    name: String!
    additionalAttributes: Attribute
}

Here Attribute is defined in another graphql schema as below in a maven project B

 type Attribute {
    key: String
    value: String
}

Project B is added as a maven dependency in Project A.

I am using io.github.deweyjose: graphqlcodegen-maven-plugin to generate client in project B.

projection generated for Rule is as below:

public RulesProjection additionalAttributes() {
        this.getFields().put("additionalAttributes", (Object)null);
        return this;
    }

The above projection does not contain reference to external field ie Attribue. How can I include Attribute related projection in Rule's projection?