Decode returns the Unicode code point sequence represented by the UTF-16 encoding s.

DecodeRune returns the UTF-16 decoding of a surrogate pair.

Encode returns the UTF-16 encoding of the Unicode code point sequence s.

EncodeRune returns the UTF-16 surrogate pair r1, r2 for the given rune.

IsSurrogate returns true if the specified Unicode code point can appear in a surrogate pair.