class Kramdown::Converter::Latex

def latex_link_target(el, add_label = false)

command will also be used additionally to the \hypertarget command.
defined, or +nil+ otherwise. If the parameter +add_label+ is +true+, a \label
Return a string containing a valid \hypertarget command if the element has an ID 
def latex_link_target(el, add_label = false)
  if (id = el.attr['id'])
    "\\hypertarget{#{id}}{}" << (add_label ? "\\label{#{id}}" : '')
  else
    nil
  end
end