<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def parse_headers_link(headers):
 """Returns the parsed header links of the response, if any."""


    header = CaseInsensitiveDict(headers).get('link')

    l = {}

    if header:
        links = parse_link(header)

        for link in links:
            key = link.get('rel') or link.get('url')
            l[key] = link

    return l