public String getTaskDefinitionArn() {
        return this.taskDefinitionArn;
    }
<p>
The ARN of the task definition to use if the event target is an Amazon ECS task.
</p>

@return The ARN of the task definition to use if the event target is an Amazon ECS task.
aws-java-sdk-eventbridge/src/main/java/com/amazonaws/services/eventbridge/model/EcsParameters.java