Adds a field-value pair to the map, checking for conflicts.
!(p)
If the field is not already present, then the field-value pair is added to the map.
If the field is already present and it has the same value as that specified, no action occurs.
If the field is already present and it has a different value to that specified, then
an exception is thrown.
@param field the field to add, not null
@param value the value to add, not null
@throws hunt.time.Exceptions if the field is already present with a different value
Adds a field-value pair to the map, checking for conflicts. !(p) If the field is not already present, then the field-value pair is added to the map. If the field is already present and it has the same value as that specified, no action occurs. If the field is already present and it has a different value to that specified, then an exception is thrown.
@param field the field to add, not null @param value the value to add, not null @throws hunt.time.Exceptions if the field is already present with a different value