class Nokogiri::XML::SAX::Parser

to set options on the parser context before parsing begins.
If a block is given, the underlying ParserContext object will be yielded. This can be used
[Yields]

parsing the input, or +nil+ for auto-detection. (default #encoding)
- +encoding+ (optional Encoding, String, nil) An Encoding or encoding name to use when
- +io+ (IO) The readable IO object from which to read input
[Parameters]

Parse an input stream.

parse_io(io, encoding) { |parser_context| ... }
parse_io(io) { |parser_context| ... }
:call-seq:
##

def parse_io(io, encoding = @encoding)
  ctx = related_class("ParserContext").io(io, encoding)
  yield ctx if block_given?
  ctx.parse_with(self)
end