 rubyid_attributes'>attributes</span><span class='period'>.</span><span class='id identifier rubyid_is_a?'>is_a?</span><span class='lparen'>(</span><span class='const'>Hash</span><span class='rparen'>)</span><span class='rparen'>)</span>
    <span class='id identifier rubyid_fail'>fail</span> <span class='const'>ArgumentError</span><span class='comma'>,</span> <span class='tstring'><span class='tstring_beg'>&quot;</span><span class='tstring_content'>The input argument (attributes) must be a hash in `Coinbas