It's good practice to try to keep passwords or sensitive secrets out of pageable memory whenever possible, so that they don't get written
to disk.
A [class@SecureEntryBuffer] is a [[email protected]] to be used with [[email protected]] which uses non-pageable memory to store a
password placed in the entry. In order to make any sense at all, the entry must have it's visibility turned off, and just be displaying
place holder characters for the text. That is, a password style entry.