Godoogle is a Go API search engine, which (by now) allows you to search by function type signature, including generic functions.
func ([]string, string) stringfunc(elems []string, sep string) string
[T any] func(bool, T, T) T[T any] func(bool, func() T, func() T)
T[a,b any] func([]a, func(a, int) b) []b
[T any] func(a []T, size int) [][]T
[T any] func (f func() T) <-chan T