class Opal::Nodes::CallNode

def handle_special

to be generated by CallNode.
this method. If this method returns nil, then the method will continue
Handle "special" method calls, e.g. require(). Subclasses can override 
def handle_special
  @compile_default = true
  if SPECIALS.include? meth
    @compile_default = false
    __send__("handle_#{meth}")
  elsif RuntimeHelpers.compatible?(recvr, meth, arglist)
    @compile_default = false
    push(RuntimeHelpers.new(@sexp, @level, @compiler).compile)
  end
end