def METHOD_NAME(self):
    # This is used in several tests
    pat = (
        r'\.loc'      # .loc directive beginning
        r'\s+[0-9]+'  # whitespace then file index
        r'\s+[0-9]+'  # whitespace then line number
        r'\s+[0-9]+'  # whitespace then column position
    )
    return re.compile(pat)