Async variant of FetchProjection(ListIDataValueProjector, IGeneralDataProjector, QueryParameters). Creates a new Retrieval query from the elements passed in, executes that retrievalquery and projects the resultset of that query using the value projectors and the projector specified. If a transaction is in progress, the command is wired to the transaction and executed inside the transaction. The projection results will be stored in the projector.

public override Task FetchProjectionAsync(
	List<IDataValueProjector> valueProjectors,
	IGeneralDataProjector projector,
	QueryParameters parameters,
	CancellationToken cancellationToken
)

Public Overrides Function FetchProjectionAsync ( 
	valueProjectors As List(Of IDataValueProjector),
	projector As IGeneralDataProjector,
	parameters As QueryParameters,
	cancellationToken As CancellationToken
) As Task