The class Plugins don't extend Adminer anymore. Adminer is now treated like any other plugin.
Hooks are now registered in the constructor and they are called dynamically.
Apart from being much more pleasant to work with, it shaves 7 kB from the compiled file.
This uses syntax from https://phpstan.org/writing-php-code/phpdoc-types#general-arrays.
int[] means an array of ints with arbitrary keys (usually strings)
list<string> means an array of strings with sequential integer keys starting at 0
list<string>[] means an arbitrary array of string lists
list<string[]> means list of arbitrary string arrays
string[][] means two dimensional array with arbitrary keys in both dimensions
array was left in the comments for https://phpstan.org/writing-php-code/phpdoc-types#array-shapes