module Asciidoctor::Extensions::IncludeProcessorDsl

def handles? *args, &block
  if block_given?
    raise ::ArgumentError, %(wrong number of arguments (given #{args.size}, expected 0)) unless args.empty?
    @handles_block = block
  # TODO enable if we want to support passing proc or lambda as argument instead of block
  #elsif ::Proc === args[0]
  #  block = args.shift
  #  raise ::ArgumentError, %(wrong number of arguments (given #{args.size}, expected 0)) unless args.empty?
  #  @handles_block = block
  elsif defined? @handles_block
    @handles_block.call args[0]
  else
    true
  end
end