All returns true if all of the strings in the slice satisfy the predicate f.

Any returns true if one of the strings in the slice satisfies the predicate f.

Difference returns the elements in `a` that aren't in `b`.

Equal returns true if both lists contains the excat same strings.

Filter returns a new slice containing all strings in the slice that satisfy the predicate f.

Include returns true if the target string t is in the slice.

Index returns the first index of the target string t, or -1 if no match is found.

Intersection of 2 slices.

Remove returns the slice after removing t from it.

RemoveDuplications returns a new distinct elements slice, using duplicateStringsList's elements, while preserving their order.