'Return the repository\'s repository dependencies that are either missing or currently being installed.'

@property
def repository_dependencies_missing_or_being_installed(self):

    required_repositories_missing_or_being_installed = []
    for required_repository in self.repository_dependencies:
        if (required_repository.status in [self.installation_status.ERROR, self.installation_status.INSTALLING, self.installation_status.NEVER_INSTALLED, self.installation_status.UNINSTALLED]):
            required_repositories_missing_or_being_installed.append(required_repository)
    return required_repositories_missing_or_being_installed
