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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def upgrade_available(name, **kwargs):
    '''
    Check whether or not an upgrade is available for a given package

    Args:
        name (str): The name of a single package

    Kwargs:
        refresh (bool): Refresh package metadata. Default ``True``
        saltenv (str): The salt environment. Default ``base``

    Returns:
        bool: True if new version available, otherwise False

    CLI Example:

    .. code-block:: bash

        salt '*' pkg.upgrade_available <package name>
    '''
    saltenv = kwargs.get('saltenv', 'base')
    # Refresh before looking for the latest version available,
    # same default as latest_version
    refresh = salt.utils.data.is_true(kwargs.get('refresh', True))

    # if latest_version returns blank, the latest version is already installed or
    # their is no package definition. This is a salt standard which could be improved.
    return latest_version(name, saltenv=saltenv, refresh=refresh) != ''