protected String resolveDefault(MemberScope<?, ?> member) {
        return this.getSchemaAnnotationValue(member, Schema::defaultValue, defaultValue -> !defaultValue.isEmpty())
                .orElse(null);
    }
Look-up the default value for the given field/method from {@code @Schema(defaultValue = ...)}.

@param member field/method to determine default value for
@return default property value or null
jsonschema-module-swagger-2/src/main/java/com/github/victools/jsonschema/module/swagger2/Swagger2Module.java