@Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("{");
        if (getJar() != null)
            sb.append("Jar: ").append(getJar()).append(",");
        if (getProperties() != null)
            sb.append("Properties: ").append(getProperties()).append(",");
        if (getMainClass() != null)
            sb.append("MainClass: ").append(getMainClass()).append(",");
        if (getArgs() != null)
            sb.append("Args: ").append(getArgs());
        sb.append("}");
        return sb.toString();
    }
Returns a string representation of this object. This is useful for testing and debugging. Sensitive data will be
redacted from this string using a placeholder value.

@return A string representation of this object.

@see java.lang.Object#toString()
aws-java-sdk-emr/src/main/java/com/amazonaws/services/elasticmapreduce/model/HadoopStepConfig.java