class Asciidoctor::Extensions::BlockProcessor

def initialize name = nil, config = {}
  super config
  @name = name || @config[:name]
  # assign fallbacks
  case @config[:contexts]
  when ::NilClass
    @config[:contexts] ||= [:open, :paragraph].to_set
  when ::Symbol
    @config[:contexts] = [@config[:contexts]].to_set
  else
    @config[:contexts] = @config[:contexts].to_set
  end
  # QUESTION should the default content model be raw??
  @config[:content_model] ||= :compound
end