\s*any whitespace character, repeated any number of times
[the literal [ (9110 / 1338 / 5B16)
(the literal ( (4010 / 508 / 2816)
.*?any character (except for line terminators), repeated any number of times
]the literal ] (9310 / 1358 / 5D16)
)the literal ) (4110 / 518 / 2916)
\s*any whitespace character, repeated any number of times
\Kresets the starting point of the reported match. Any previously consumed characters are no longer included in the final match