You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: set.go
    path of file: ./repos/gotosocial/vendor/go.opentelemetry.io/otel/attribute
    
    the code of the file until where you have to start completion: // Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR COND
    
func (l *Set) Filter(re Filter) (Set, []KeyValue) {
	if re == nil {
		return *l, nil
	}

	// Iterate in reverse to the first attribute that will be filtered out.
	n := l.Len()
	first := n - 1
	for ; first >= 0; first-- {
		kv, _ := l.Get(first)
		if !re(kv) {
			break
		}
	}

	// No attributes will be dropped, return the immutable Set l and nil.
	if first < 0 {
		return *l, nil
	}

	// Copy now that we know we need to return a modified set.
	//
	// Do not do this in-place on the underlying storage of *Set l. Sets are
	// immutable and filtering should not change this.
	slice := l.ToSlice()

	// Don't re-iterate the slice if only slice[0] is filtered.
	if first == 0 {
		// It is safe to assume len(slice) >= 1 given we found at least one
		// attribute above that needs to be filtered out.
		return Set{equivalent: computeDistinct(slice[1:])}, slice[:1]
	}

	// Move the filtered slice[first] to the front (preserving order).
	kv := slice[first]
	copy(slice[1:first+1], slice[:first])
	slice[0] = kv

	// Do not re-evaluate re(slice[first+1:]).
	div := filteredToFront(slice[1:first+1], re) + 1
	return Set{equivalent: computeDistinct(slice[div:])}, slice[:div]
}