code: // Licensed to the Software Freedom Conservancy (SFC) under one
  // or more contributor license agreements.  See the NOTICE file
  // distributed with this work for additional information
  // regarding copyright ownership.  The SFC licenses this file
  // to you under the Apache License, Version 2.0 (the
  // "License"); you may not use this file except in compliance
  // with the License.  You may obtain a copy of the License at
  //
  //   http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing,
  // software distributed under the License is distributed on an
  // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  // KIND, either express or implied.  See the License for the
  // specific language governing permissions and limitations
  // under the License.
  
  package org.openqa.selenium.cli;
  
  import java.io.PrintStream;
  import java.util.Set;
  import org.openqa.selenium.grid.config.Role;
  
  public interface CliCommand {
  
    String getName();
  
    String getDescription();
  
    /**
     * Allows a command to indicate that certain aspects are configurable. Any roles that are exposed
     * here will be matched against flag objects which implement {@link
     * org.openqa.selenium.grid.config.HasRoles} to allow configuration via command line flags.
     */
    Set<Role> getConfigurableRoles();
  
    /**
     * Allows the set of objects used for finding command-line flags to be augmented with default
     * implementations.
     */
    Set<Object> getFlagObjects();
  
    Executable configure(PrintStream out, PrintStream err, String... args);
  
    default boolean isShown() {
      return true;
    }
  
    interface Executable {
  
      void run();
    }
  }
  