Const produces a function that takes an argument and returns the original argument, ignoring the passed-in value.

Deref returns the value e points to if it's non-nil.

DerefFunc returns the value e points to if it's non-nil.

DerefZero returns the value e points to if it's non-nil.

Identity is a function that returns its given parameters.

Pointer returns a pointer for the given value.

TODO is a function to create holes when stubbing out more complex mechanisms.

Zero returns the zero value for the given type.

ZeroPointer returns a pointer to a zero value of type E.