code: public Object body(Object[] swaggerMethodArguments) {
          Object result = null;
  
          if (bodyContentMethodParameterIndex != null
                  && swaggerMethodArguments != null
                  && 0 <= bodyContentMethodParameterIndex
                  && bodyContentMethodParameterIndex < swaggerMethodArguments.length) {
              result = swaggerMethodArguments[bodyContentMethodParameterIndex];
          }
  
          if (formSubstitutions != null
                  && !formSubstitutions.isEmpty()
                  && swaggerMethodArguments != null) {
              result = formSubstitutions.stream()
                  .map(s -> serializeFormData(s.urlParameterName(), swaggerMethodArguments[s.methodParameterIndex()]))
                  .collect(Collectors.joining("&"));
          }
  
          return result;
      }
docs: Get the object to be used as the value of the HTTP request.
  
  @param swaggerMethodArguments the method arguments to get the value object from
  @return the object that will be used as the body of the HTTP request