code: private void initializeFloatingActionButtons() {
          smallFloatingActionButton = findViewById(R.id.floating_action_button_small);
          smallFloatingActionButton.setOnClickListener(createFloatingActionButtonListener());
          normalFloatingActionButton = findViewById(R.id.floating_action_button_normal);
          normalFloatingActionButton.setOnClickListener(createFloatingActionButtonListener());
          largeFloatingActionButton = findViewById(R.id.floating_action_button_large);
          largeFloatingActionButton.setOnClickListener(createFloatingActionButtonListener());
      }
docs: Initializes the floating action buttons.