if _, dup := decompressors.LoadOrStore(method, dcomp); dup {
		panic("decompressor already registered")
	}
}

// RegisterCompressor registers custom compressors for a specified method ID.
// The common methods [Store] and [Deflate] are built in.
func RegisterCompressor(method uint16, comp Compressor) {
	if _, dup := compressors.LoadOrStore(method, comp); dup {
		panic("compressor already registered")
	}
}

			extra := ""
			if f.Name != "" {
				extra = " " + f.Name
			}
			log.Fatalf("writing %s%s: %v", name, extra, err)
		}
	}()

	zw := zip.NewWriter(out)
	zw.RegisterCompressor(zip.Deflate, func(out io.Writer) (io.WriteCloser, error) {
		return flate.NewWriter(out, flate.BestCompression)
	})
	for _, f = range a.Files {
		h := check(zip.FileInfoHeader(f.Info()))
		h.Name = f.Name

		{"(*Writer).Copy", Method, 17},
		{"(*Writer).Create", Method, 0},
		{"(*Writer).CreateHeader", Method, 0},
		{"(*Writer).CreateRaw", Method, 17},
		{"(*Writer).Flush", Method, 4},
		{"(*Writer).RegisterCompressor", Method, 6},
		{"(*Writer).SetComment", Method, 10},
		{"(*Writer).SetOffset", Method, 5},
		{"Compressor", Type, 2},
		{"Decompressor", Type, 2},
		{"Deflate", Const, 0},
		{"ErrAlgorithm", Var, 0},