def METHOD_NAME(self):
    """Return whether or not this toolchain is deprecated."""
    deprecated = False
    # make sure a non-symbolic version (e.g., 'system') is used before making comparisons using LooseVersion
    if re.match('^[0-9]', str(self.iimkl_ver)):
        # iimkl toolchains older than iimkl/2019a are deprecated since EasyBuild v4.5.0
        if LooseVersion(self.iimkl_ver) < LooseVersion('2019'):
            deprecated = True
    return deprecated