public RelationalDatabaseParameter withAllowedValues(String allowedValues) {
        setAllowedValues(allowedValues);
        return this;
    }
<p>
Specifies the valid range of values for the parameter.
</p>

@param allowedValues
       Specifies the valid range of values for the parameter.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-lightsail/src/main/java/com/amazonaws/services/lightsail/model/RelationalDatabaseParameter.java