code: def _load_scratch_orgs(self):
          
          current_orgs = self.list_orgs()
          if not self.project_config.orgs__scratch:
              return
          for config_name in self.project_config.orgs__scratch.keys():
              if config_name in current_orgs:
                  # Don't overwrite an existing keychain org
                  continue
              self.create_scratch_org(config_name, config_name)
docs: Creates all scratch org configs for the project in the keychain if
              a keychain org doesn't already exist