public Boolean getIs64BitsOnly() {
        return this.is64BitsOnly;
    }
<p>
Indicates whether the <code>SupportedInstanceType</code> only supports 64-bit architecture.
</p>

@return Indicates whether the <code>SupportedInstanceType</code> only supports 64-bit architecture.
aws-java-sdk-emr/src/main/java/com/amazonaws/services/elasticmapreduce/model/SupportedInstanceType.java