code: def get_item_metadata(self, eitem):
          
  
          eitem_metadata = {}
  
          # Get the project entry for the item, which includes the metadata
          project = self.find_item_project(eitem)
  
          if project and 'meta' in self.json_projects[project]:
              meta_fields = self.json_projects[project]['meta']
              if isinstance(meta_fields, dict):
                  eitem_metadata = {CUSTOM_META_PREFIX + "_" + field: value for field, value in meta_fields.items()}
  
          return eitem_metadata
docs: In the projects.json file, inside each project, there is a field called "meta" which has a
          dictionary with fields to be added to the enriched items for this project.
  
          This fields must be added with the prefix cm_ (custom metadata).
  
          This method fetch the metadata fields for the project in which the eitem is included.
  
          :param eitem: enriched item to search metadata for
          :return: a dictionary with the metadata fields