public TestInvokeAuthorizerResult withPrincipalId(String principalId) {
        setPrincipalId(principalId);
        return this;
    }
<p>
The principal identity returned by the Authorizer
</p>

@param principalId
       The principal identity returned by the Authorizer
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-api-gateway/src/main/java/com/amazonaws/services/apigateway/model/TestInvokeAuthorizerResult.java