(iField: math.Ordered[ICodes.IField]).<(that)
(iField: math.Ordered[ICodes.IField]).<=(that)
(iField: math.Ordered[ICodes.IField]).>(that)
(iField: math.Ordered[ICodes.IField]).>=(that)
(iField: math.Ordered[ICodes.IField]).compare(that)
(iField: math.Ordered[ICodes.IField]).compareTo(that)
Represent a field in ICode