Interface is called by SSPM within ECS to support usage tracking of the internal model. The object should be thread safe as a single instance of this will be created for each instance of ECS
and methods may be called on multiple threads
Defines the supported cell error values that can be returned in an object during a call to the methods GetRange(String, String, RangeCoordinates, Boolean, ) and GetCell(String, String, Int32, Int32, Boolean, ).
Type of request which was completed (used as part of the RequestComplete api). Process requests are a type of Execute requests but given the
differences in behavior and execution time they are called out as a separate type