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Notice: Undefined offset: 1 in Drupal\bm_utilities\Plugin\Block\blockVerticalMenu->build() (line 36 of modules/bm_utilities/src/Plugin/Block/blockVerticalMenu.php).
Notice: Undefined offset: 2 in Drupal\bm_utilities\Plugin\Block\blockVerticalMenu->build() (line 37 of modules/bm_utilities/src/Plugin/Block/blockVerticalMenu.php).
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