code: public WikiPage createPage(Object projectIdOrPath, String title, String content) throws GitLabApiException {
          // one of title or content is required
          GitLabApiForm formData = new GitLabApiForm()
                  .withParam("title", title)
                  .withParam("content", content);
  
          Response response = post(Response.Status.CREATED, formData,
                  "projects", getProjectIdOrPath(projectIdOrPath), "wikis");
          return (response.readEntity(WikiPage.class));
      }
docs: Creates a new project wiki page. The user must have permission to create new wiki page.
  
  <pre><code>GitLab Endpoint: POST /projects/:id/wikis</code></pre>
  
  @param projectIdOrPath the project in the form of an Integer(ID), String(path), or Project instance
  @param title the title of a snippet, required
  @param content the content of a wiki page, required
  @return a WikiPage instance with info on the created page
  @throws GitLabApiException if any exception occurs