public String getIamRoleArn() {
        return this.iamRoleArn;
    }
This is a user-defined role that AWS Chatbot will assume. This is not the service-linked role. For more
information, see IAM Policies for AWS Chatbot.

@return This is a user-defined role that AWS Chatbot will assume. This is not the service-linked role. For more
        information, see IAM Policies for AWS Chatbot.
aws-java-sdk-chatbot/src/main/java/com/amazonaws/services/chatbot/model/CreateChimeWebhookConfigurationRequest.java