Handling of Required.DisallowNull

[mnemcik-visma]

If a property is annotated with [JsonProperty(Required = Required.DisallowNull)], the output openapi schema indicates such field as a required field.

From the description of the DisallowNull: The property is not required but it cannot be a null value.

This in my opinion makes more sense to not mark a particular property required, because in fact it is not required. The meaning of this setting is to make sure to provide a value if the property name is defined, thus more defining the expected parsing behavior & format of the provided json, compared to the actually requiring that field to be present in the json file.