Declarative and imperative way
Since the above scenario already have all needed for the create content type group request, we don't need to repeat it here, so we change from imperative way:
```
        When I create a "POST" request to "/content/typegroups"
        And I add "content-type" header with "Input" for "ContentTypeGroup"
        And I add "accept" header for a "ContentTypeGroup"
        And I make a "ContentTypeGroupCreateStruct" object
        And I add "some_string" value to "identifier" field
        And I send the request
```
to declarative way:
```
        When I create a Content Type Group with identifier "some_string"