public String getMainClass() {
        return this.mainClass;
    }
<p>
The name of the main class in the specified Java file. If not specified, the JAR file should specify a main class
in its manifest file.
</p>

@return The name of the main class in the specified Java file. If not specified, the JAR file should specify a
        main class in its manifest file.
aws-java-sdk-emr/src/main/java/com/amazonaws/services/elasticmapreduce/model/HadoopStepConfig.java