block_core_navigation_render_fallback, $fallback_blocks

apply_filters('block_core_navigation_render_fallback, $fallback_blocks') is found 1 times:

• /build/scripts/block-library/navigation.php line 1523

  	 * @since 5.9.0
  	 *
  	 * @param array[] $fallback_blocks default fallback blocks provided by the default block mechanic.
  	 */
  	return apply_filters( 'block_core_navigation_render_fallback', $fallback_blocks );
  }
  
  /**
   * Iterate through all inner blocks recursively and get navigation link block's post IDs.
   *
   * @since 6.0.0
  

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