void (PsiReferenceRegistrar registrar, @NonNls String @Nullable [] attributeNames, @Nullable ElementFilter elementFilter, boolean caseSensitive, @NotNull PsiReferenceProvider provider, double priority) { if (attributeNames == null) { registrar.registerReferenceProvider(XmlPatterns.xmlAttributeValue().and(new FilterPattern(elementFilter)), provider, priority); return; } final StringPattern namePattern = caseSensitive ? StandardPatterns.string().oneOf(attributeNames) : StandardPatterns.string().oneOfIgnoreCase(attributeNames); registrar .registerReferenceProvider(XmlPatterns.xmlAttributeValue().withLocalName(namePattern).and(new FilterPattern(elementFilter)), provider, priority); }