code: public static Rollbar init(Context context, String accessToken, String environment, boolean registerExceptionHandler, boolean includeLogcat) {
      return init(context, accessToken, environment, registerExceptionHandler, includeLogcat, null);
    }
docs: Initialize the singleton instance of Rollbar.
  
  @param context     Android context to use.
  @param accessToken a Rollbar access token with at least post_client_item scope
  @param environment the environment to set for items
  @param registerExceptionHandler whether or not to handle uncaught exceptions.
  @param includeLogcat whether or not to include logcat output with items
  @return the managed instance of Rollbar.