MethodFilter instances allow SpEL users to fine tune the behaviour of the method
resolution process. Method resolution (which translates from a method name in an
expression to a real method to invoke) will normally retrieve candidate methods for
invocation via a simple call to 'Class.getMethods()' and will choose the first one that
is suitable for the input parameters. By registering a MethodFilter the user can
receive a callback and change the methods that will be considered suitable.
Called by the method resolver to allow the SpEL user to organize the list of
candidate methods that may be invoked. The filter can remove methods that should
not be considered candidates and it may sort the results. The resolver will then
search through the methods as returned from the filter when looking for a suitable
candidate to invoke.
methods - the full list of methods the resolver was going to choose from
a possible subset of input methods that may be sorted by order of relevance