code: public static void get(@NotNull String path, @NotNull Handler handler, @NotNull Set<Role> permittedRoles) {
          staticInstance().get(prefixPath(path), handler, permittedRoles);
      }
docs: Adds a GET request handler with the given roles for the specified path to the instance.
  The method can only be called inside a {@link Javalin#routes(EndpointGroup)}.
  
  @see AccessManager
  @see <a href="https://javalin.io/documentation#handlers">Handlers in docs</a>