public AssociateRoleToGroupRequest withRoleArn(String roleArn) {
        setRoleArn(roleArn);
        return this;
    }
The ARN of the role you wish to associate with this group. The existence of the role is not validated.

@param roleArn
       The ARN of the role you wish to associate with this group. The existence of the role is not validated.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-greengrass/src/main/java/com/amazonaws/services/greengrass/model/AssociateRoleToGroupRequest.java