public static Task<IEntityCollection> GetMultiAsync<TEntity>(
	this IEntityCollection toFill,
	EntityQuery<TEntity> query,
	CancellationToken cancellationToken
)
where TEntity : IEntity

<ExtensionAttribute>
Public Shared Function GetMultiAsync(Of TEntity As IEntity) ( 
	toFill As IEntityCollection,
	query As EntityQuery(Of TEntity),
	cancellationToken As CancellationToken
) As Task(Of IEntityCollection)