'>.</span><span class='id identifier rubyid_merge!'>merge!</span><span class='lparen'>(</span><span class='label'>id:</span> <span class='id identifier rubyid_model_or_family_name_or_cst'>model_or_family_name_or_cst</span><span class='period'>.</span><span class='id identifier rubyid_id'>id</span><span class='rparen'>)</span> <span class='kw'>if</span> <span class='id identifier rubyid_model_or_family_name_or_cst'>model_or_family_name_or_cst</span><span class='period'>.</span><span class='id identifier ruby