### Question:
SnippetCompletion implements Completion { @Nonnull @Override public String getSortOrderPrefix() { return SNIPPETS.prefix; } @Inject  SnippetCompletion(@Named("Snippets") CompletionStorage snippets); @Nonnull @Override Collection<String> getCompletionSource(MyDocumentModel document); @Nullable @Override String tryResolve(@Nonnull String label); @Nonnull @Override String getSortOrderPrefix(); @Nonnull @Override CompletionItem customize(@Nonnull CompletionItem item); @Nonnull @Override CompletionItemKind getKind();  }### Answer:
@Test void testGetSortOrderPrefix() { assertEquals("4", provider.getSortOrderPrefix()); }