@Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        Parameter parameter = (Parameter) o;
        return required == parameter.required
                && Objects.equals(type, parameter.type)
                && name.equals(parameter.name)
                && Objects.equals(value, parameter.value)
                && Objects.equals(builtIn, parameter.builtIn)
                && Objects.equals(defaultValue, parameter.defaultValue)
                && Objects.equals(deprecated, parameter.deprecated)
                && Objects.equals(documentation, parameter.documentation);
    }
Gets the parameter's default value.

@return returns the optional default value.
smithy-rules-engine/src/main/java/software/amazon/smithy/rulesengine/language/syntax/parameters/Parameter.java