All checks if all elements in slice fulfill handler function condition.

Any checks if there is at least one element in slice which fulfills handler function condition.

Contains checks if 'lookup' argument is available in given 'slice'.

Filter filters slice to elements which fulfill handler function condition.

ForEach applies handler function to each elements of slice Handler function must transform string to string (string -> string).

InitSet initializes sets internal map.

StringSet is set implementation on top of map.

StringMap is custom wrapper for golang map It provides additional capabilities like list of keys, list of values, Empty.