This class does not exist. It is here purely to describe what methods a custom data container, holding an element vector, must implement in order to be used as an argument to functions in the NAG CPP Interface.
An example of a class implementing these methods can be seen in
examples/include/nag_my_vector.hpp.
An example of a generic class for a data container that can be used to hold either a vector, matrix or table, can be seen in
examples/include/nag_my_data.hpp.
None.