public String getParameter() {
        String theParameter = parameter.get();
        if (theParameter == null) {
            throw new IllegalStateException("Custom Converter Parameter has not yet been set!");
        }
        return theParameter;
    }
Retrieves the static parameter configured for this particular converter instance.
It is not advisable to call this method from converter constructor as the parameter is not yet there.

@return parameter value
@throws IllegalStateException if parameter has not been set yet.
core/src/main/java/com/github/dozermapper/core/DozerConverter.java