public static void copy(InputStream in, Charset charset, Writer writer) throws IOException {
		copy(in, writer, charset, newCharBuffer());
	}
Transfers content of {@link InputStream} into {@link Writer}.

@param in
		Stream to transfer content from.
@param writer
		Writer to transfer content to.
@param charset
		Charset that will be used to read data.

@throws IOException
		When any I/O error occurs.
@see IOUtil#newCharBuffer()
recaf-core/src/main/java/software/coley/recaf/util/IOUtil.java