packages/auth/src/autheventmanager.js
function() {
        if (!self.initialized_) {
          self.initialized_ = true;
          // Listen to Auth events on iframe.
          self.oauthSignInHandler_.addAuthEventListener(self.authEventHandler_);
        }
      }
function() {
        if (!self.initialized_) {
          self.initialized_ = true;
          // Listen to Auth events on iframe.
          self.oauthSignInHandler_.addAuthEventListener(self.authEventHandler_);
        }
      }
function ( ) { if ( ! self . initialized_ ) { self . initialized_ = true ; // Listen to Auth events on iframe. self . oauthSignInHandler_ . addAuthEventListener ( self . authEventHandler_ ) ; } }
On initialization, add Auth event listener if not already added.
On initialization add Auth event listener if not already added .