'id identifier rubyid_instance_exec'>instance_exec</span><span class='lparen'>(</span><span class='op'>&amp;</span><span class='id identifier rubyid_prevention'>prevention</span><span class='period'>.</span><span class='id identifier rubyid_block'>block</span><span class='rparen'>)</span>
        <span class='ivar'>@feasibility_messages</span><span class='lbracket'>[</span><span class='id identifier rubyid_action_name'>action_name</span><span class='rbracket'>]</span> <span class='op'>&lt;&lt;</span> <span 