in src/main/java/ru/adelf/idea/dotenv/extension/DotEnvReferencesSearcher.java [21:26]
public void processQuery(@NotNull ReferencesSearch.SearchParameters queryParameters, @NotNull Processor<? super PsiReference> consumer) {
PsiElement refElement = queryParameters.getElementToSearch();
if (!(refElement instanceof DotEnvProperty)) return;
addPropertyUsages((DotEnvProperty)refElement, queryParameters.getEffectiveSearchScope(), queryParameters.getOptimizer());
}