able_defined?</span><span class='lparen'>(</span><span class='symbol'>:&quot;@</span><span class='embexpr_beg'>#{</span><span class='id identifier rubyid_attr'>attr</span><span class='embexpr_end'>}</span><span class='tstring_end'>&quot;</span></span><span class='rparen'>)</span><span class='rparen'>)</span>
    <span class='kw'>end</span>

    <span class='id identifier rubyid_hash'>hash</span><span class='lbracket'>[</span><span class='id identifier rubyid_param'>param</span><span class='rbracket'>]</span