php - Magento method "removeTab" doesn't work -


i made observer triggers on event adminhtml_block_html_before, when try remove tab nothing happens. here's code:

public function altermenu($observer) {     $block = $observer->getblock();          if ($block instanceof mage_adminhtml_block_sales_order_view_tabs)         $block->removetab('order_rma');     }

after, if use print_r($block->gettabsids()); there following situation:

array (     [0] => order_info     [1] => order_invoices     [2] => order_creditmemos     [3] => order_shipments     [4] => order_history     [5] => order_transactions )

but tab still visible. i'm using magento ee 1.12. suggestions?

thanks!

resolved event core_block_abstract_to_html_before instead of adminhtml_block_html_before, event tab removed before rendered.


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