void (@NotNull PsiElement element, @NotNull AnnotationHolder holder) { if (PsiUtilCore.getElementType(element) != XmlTokenType.XML_NAME) return; PsiElement parent = element.getParent(); if (!(parent instanceof XmlTag) && !(parent instanceof XmlAttribute)) return; TextRange elementRange = element.getTextRange(); List<SchemaPrefixReference> references = ContainerUtil.findAll(parent.getReferences(), SchemaPrefixReference.class); for (SchemaPrefixReference ref : references) { TextRange rangeInElement = ref.getRangeInElement(); if (rangeInElement.isEmpty()) continue; TextRange range = rangeInElement.shiftRight(ref.getElement().getTextRange().getStartOffset()); if (!range.intersects(elementRange)) continue; holder.newSilentAnnotation(HighlightSeverity.INFORMATION).range(range).textAttributes(XmlHighlighterColors.XML_NS_PREFIX).create(); } }