class Kramdown::Parser::Kramdown

the values are two element arrays consisting of the link target and a title (can be +nil+).
The parameter +link_defs+ is a hash where the keys are possibly unnormalized link IDs and

:link_defs option).
Update the parser specific link definitions with the data from +link_defs+ (the value of the

:doc:

def update_link_definitions(link_defs)
  link_defs.each {|k, v| @link_defs[normalize_link_id(k)] = v }
end