fn Buffer::capacity(self : Buffer) -> Int

fn Buffer::length(self : Buffer) -> Int

fn Buffer::new(capacity? : Int) -> Buffer

fn Buffer::to_wtf16(self : Buffer) -> Wtf16

fn Buffer::write_char(self : Buffer, value : Char) -> Unit

fn Buffer::write_codepoint(self : Buffer, value : 
@tonyfettes/unicode/codepoint.CodePoint
CodePoint) -> Unit

fn Buffer::write_codeunit(self : Buffer, value : UInt16) -> Unit

fn Buffer::write_string(self : Buffer, value : String) -> Unit

fn Wtf16::codepoints(self : Wtf16) -> Iter[
@tonyfettes/unicode/codepoint.CodePoint
CodePoint]

#as_free_fn
fn Wtf16::of_codepoints(cps : FixedArray[
@tonyfettes/unicode/codepoint.CodePoint
CodePoint]) -> Wtf16

#as_free_fn
fn Wtf16::of_codeunits(cu : FixedArray[UInt16]) -> Wtf16

#as_free_fn
fn Wtf16::of_string(s : String) -> Wtf16

fn Wtf16::to_codepoints(self : Wtf16) -> FixedArray[
@tonyfettes/unicode/codepoint.CodePoint
CodePoint]

fn Wtf16::to_codeunits(self : Wtf16) -> FixedArray[UInt16]

fn Wtf16::to_string(self : Wtf16) -> String raise Malformed