# File lib/kramdown/parser/kramdown/header.rb, line 52
      def parse_atx_header
        return false if !after_block_boundary?

        result = @src.scan(ATX_HEADER_MATCH)
        level, text, id = @src[1], @src[2], @src[3]
        text.strip!
        el = new_block_el(:header, nil, nil, :level => level.length, :raw_text => text)
        add_text(text, el)
        el.attr['id'] = id if id
        @tree.children << el
        true
      end