4-schema.ts

private createSchema(
    api: appsync.CfnGraphQLApi
): appsync.CfnGraphQLSchema {
    const name = 'Schema';
    const definition = `
        type Output {
            Numbers: [Int!]!
        }

        type Query {
            getOutput(number: Int!, count: Int!): Output!
        }
    `;
    const schema = new appsync.CfnGraphQLSchema(this, name, {
        apiId: api.attrApiId,
        definition: definition
    });

    schema.addDependsOn(api);

    return schema;
}