Below are the default links. Ie if you did not specify NOFOLLOW_LINKS, then links follow.
From the documentation of the Files.getLastModifiedTime() method (highlighted by me):
An array of options can be used to indicate how symbolic links are handled for the case when the file is a symbolic link. By default, symbolic links are used and the file attribute of the final destination of the link is read. If the NOFOLLOW_LINKS option is present, then symbolic links are not respected.
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