Only Span<T>.Get Pinnable Reference Method
A read-only reference to an object of type T that can be used for pinning, and is required to support the use of span within a fixed statement.
public: T& ^ GetPinnableReference();
public ref readonly T GetPinnableReference ();
member this.GetPinnableReference : unit -> 'T
Public Function GetPinnableReference () As T
A reference to the element of the span at index 0, or
null if the span is empty.