code: def _generate_main_files_header(notebook_object, notebook_title="Notebook Title",
                                  notebook_description="Notebook Description"):
      
  
      # =================================== Creation of Header =======================================
      header_temp = HEADER_MAIN_FILES.replace("Notebook Title", notebook_title)
      notebook_object["cells"].append(nb.v4.new_markdown_cell(header_temp))
  
      # ================ Insertion of the div reserved to the Notebook Description ===================
      notebook_object["cells"].append(nb.v4.new_markdown_cell(notebook_description,
                                                              **{"metadata":
                                                                 {"tags": ["test"]}}))
docs: Internal function that is used for generation of the 'MainFiles' notebooks header.
  
      ----------
      Parameters
      ----------
      notebook_object : notebook object
          Object of "notebook" class where the header will be created.
  
      notebook_title : None or str
          Title of the Notebook.
  
      notebook_description : str
          An introductory text to present the Notebook and involve the reader.