question: public List < String > explainMismatch ( Issue issue ) { Objects . requireNonNull ( issue ) ; List < String > result = new LinkedList < > ( ) ; for ( IssuePropertyMatcher propertyMatcher : propertyMatchers ) { if ( ! propertyMatcher . matches ( issue ) ) result . add ( propertyMatcher . getMessage ( issue ) ) ; } return result ; }
target:  Returns a list of explanations for each mismatched property matcher for the given issue.