def self.write_one(object, writer, singular = nil)
singular ||= 'statistic'
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, 'kind', object.kind) unless object.kind.nil?
Writer.write_string(writer, 'name', object.name) unless object.name.nil?
Writer.write_string(writer, 'type', object.type) unless object.type.nil?
Writer.write_string(writer, 'unit', object.unit) unless object.unit.nil?
ValueWriter.write_many(object.values, writer, 'value', 'values') unless object.values.nil?
GlusterBrickWriter.write_one(object.brick, writer, 'brick') unless object.brick.nil?
DiskWriter.write_one(object.disk, writer, 'disk') unless object.disk.nil?
GlusterVolumeWriter.write_one(object.gluster_volume, writer, 'gluster_volume') unless object.gluster_volume.nil?
HostWriter.write_one(object.host, writer, 'host') unless object.host.nil?
HostNicWriter.write_one(object.host_nic, writer, 'host_nic') unless object.host_nic.nil?
NumaNodeWriter.write_one(object.host_numa_node, writer, 'host_numa_node') unless object.host_numa_node.nil?
NicWriter.write_one(object.nic, writer, 'nic') unless object.nic.nil?
StepWriter.write_one(object.step, writer, 'step') unless object.step.nil?
VmWriter.write_one(object.vm, writer, 'vm') unless object.vm.nil?
writer.write_end
end