sidebars.json

{
  "docs": {
    "Installation": ["installation-ios", "installation-android"],
    "Subscription": ["doc2"],
    "Notification Events": ["doc3"],
    "Advanced API - iOS": ["doc3"]
  },
  "api": {
    "Api": ["general-api", "ios-api", "android-api"],
    "Events": ["general-events", "ios-events", "android-events"]
  }
}