whole_func_string: function extend(o) {
              const cpy = (i,s) => { o[i] = s; };
              each(arguments, (i,a) => { i && each(a, cpy); });
              return o;
          }
func_code_string: function extend(o) {
              const cpy = (i,s) => { o[i] = s; };
              each(arguments, (i,a) => { i && each(a, cpy); });
              return o;
          }
func_documentation_string: -------------------------------------------------------------