public void setSingleInstanceType(Boolean singleInstanceType) {
        this.singleInstanceType = singleInstanceType;
    }
<p>
Indicates that the fleet uses a single instance type to launch all Spot Instances in the fleet.
</p>
<p>
Supported only for fleets of type <code>instant</code>.
</p>

@param singleInstanceType
       Indicates that the fleet uses a single instance type to launch all Spot Instances in the fleet.</p>
       <p>
       Supported only for fleets of type <code>instant</code>.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/SpotOptionsRequest.java