class Asciidoctor::AbstractBlock

def initialize parent, context, opts = {}
  super
  @content_model = :compound
  @blocks = []
  @subs = []
  @id = @title = @caption = @numeral = @style = @default_subs = @source_location = nil
  if context == :document || context == :section
    @level = @next_section_index = 0
    @next_section_ordinal = 1
  elsif AbstractBlock === parent
    @level = parent.level
  else
    @level = nil
  end
end