<span class='id identifier rubyid_positive?'>positive?</span>
    <span class='id identifier rubyid_raise'>raise</span> <span class='tstring'><span class='tstring_beg'>&quot;</span><span class='tstring_content'>Please provide a value for the required property(s) </span><span class='embexpr_beg'>#{</span><span class='id identifier rubyid_missing_properties'>missing_properties</span><span class='period'>.</span><span class='id identifier rubyid_join'>join</span><span class='lparen'>(</span><span class='tstrin