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CRM_Utils_Request::retrieve( 'mainID', 'Integer', $form, false, null, $_REQUEST );
Second: At several points (notably at lines 82 and following) something like Code: [Select]CRM_Utils_Request::retrieve( 'mainID', 'Integer', $form, false, null, $_REQUEST ); is called. This is clearly deeply below the API - can someone enlighten me as to what's being retrieved here?
Try as I might, I can't seem to grok the method for setting markup from buildForm
$form->assign('intro_text', '<p>Hello World</p>');