class RubyXL::DocumentProperties

def add_parts_count(name, count)
  return unless count > 0
  heading_pairs.vt_vector.vt_variant << RubyXL::Variant.new(:vt_lpstr => RubyXL::StringNode.new(:value => name))
  heading_pairs.vt_vector.vt_variant << RubyXL::Variant.new(:vt_i4 => RubyXL::IntegerNode.new(:value => count))
end