public void setValueWhenUnset(DecimalValueWhenUnsetConfiguration valueWhenUnset) {
        this.valueWhenUnset = valueWhenUnset;
    }
<p>
The configuration that defines the default value of a <code>Decimal</code> parameter when a value has not been
set.
</p>

@param valueWhenUnset
       The configuration that defines the default value of a <code>Decimal</code> parameter when a value has not
       been set.
aws-java-sdk-quicksight/src/main/java/com/amazonaws/services/quicksight/model/DecimalParameterDeclaration.java