'>params</span> <span class='op'>||=</span> <span class='id identifier rubyid_button_defaults'>button_defaults</span><span class='lbracket'>[</span><span class='symbol'>:params</span><span class='rbracket'>]</span> <span class='op'>||</span> <span class='lbrace'>{</span><span class='rbrace'>}</span>
  <span class='id identifier rubyid_model'>model</span> <span class='op'>=</span> <span class='id identifier rubyid_model_or_family_name_or_cst'>model_or_family_name_or_cst</span><span class='period'>.</span><sp