def self.write_one(object, writer, singular = nil)
singular ||= 'image_transfer'
writer.write_start(singular)
href = object.href
writer.write_attribute('href', href) unless href.nil?
writer.write_attribute('id', object.id) unless object.id.nil?
Writer.write_string(writer, 'comment', object.comment) unless object.comment.nil?
Writer.write_string(writer, 'description', object.description) unless object.description.nil?
Writer.write_string(writer, 'direction', object.direction) unless object.direction.nil?
Writer.write_string(writer, 'name', object.name) unless object.name.nil?
Writer.write_string(writer, 'phase', object.phase) unless object.phase.nil?
Writer.write_string(writer, 'proxy_url', object.proxy_url) unless object.proxy_url.nil?
Writer.write_string(writer, 'signed_ticket', object.signed_ticket) unless object.signed_ticket.nil?
HostWriter.write_one(object.host, writer, 'host') unless object.host.nil?
ImageWriter.write_one(object.image, writer, 'image') unless object.image.nil?
writer.write_end
end