ios – 继承什么！ ：search_paths呢？

# Note: There are no targets called "Shows" in any of this workspace's Xcode projects
abstract_target 'Shows' do
  pod 'ShowsKit'

  # The target ShowsiOS has its own copy of ShowsKit (inherited) + ShowWebAuth (added here)
  target 'ShowsiOS' do
    pod 'ShowWebAuth'
  end

  # The target ShowsTV has its own copy of ShowsKit (inherited) + ShowTVAuth (added here)
  target 'ShowsTV' do
    pod 'ShowTVAuth'
  end

  # Our tests target has its own copy of
  # our testing frameworks,and has access
  # to ShowsKit as well because it is
  # a child of the abstract target 'Shows'

  target 'ShowsTests' do
    inherit! :search_paths
    pod 'Specta'
    pod 'Expecta'
  end
end

我不明白为什么要继承！ ：search_paths是必要的吗？所有3个目标,ShowsiOS,ShowsTV和ShowsTests都可以从其父目标访问ShowsKit.

继承的具体例子！ (从https://guides.cocoapods.org/syntax/podfile.html#inherit_bang开始)没有增加任何清晰度

target 'App' do
  target 'AppTests' do
    inherit! :search_paths
  end
end

你能帮我理解继承的东西吗？ ：search_paths是为了？