private void processInjectionHost(@NotNull UInjectionHost node) {
        PsiElement psi = node.getSourcePsi();
        if (psi != null) {
          for (PsiReference ref : psi.getReferences()) {
            if (ref instanceof FileReference) {
              refs.add((FileReference)ref);
            }
          }
        }
      }
private void processInjectionHost(@NotNull UInjectionHost node)