public String getIamRoleArn() {
        return this.iamRoleArn;
    }
The ARN of the IAM role that defines the permissions for AWS Chatbot. 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 The ARN of the IAM role that defines the permissions for AWS Chatbot. 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/TeamsChannelConfiguration.java