returns true if any required field is missing . jaxb does not enforce required = true without a given xml schema . since we do most of our validation using the data class constructors , the only extra logic we need is to ensure that every xml element in the document is present . jaxb sets missing elements as null , so we check for that . concode_field_sep String tagName concode_field_sep Tag toModelType
boolean function ( ) { return Utils . isAnyNull ( tagName ) ; }