an class='id identifier rubyid_comp_name_or_cst_or_class'>comp_name_or_cst_or_class</span><span class='comma'>,</span>
                <span class='id identifier rubyid_model_or_family_name_or_cst'>model_or_family_name_or_cst</span> <span class='op'>=</span> <span class='kw'>nil</span><span class='comma'>,</span>
                <span class='label'>label_opts:</span> <span class='kw'>nil</span><span class='comma'>,</span>
                <span class='label'>params:</span> <span class='kw'>nil</span><span cl