public Task<IEnumerable<DataTableEx>> GetFileTablesExAsync(
	string connectionId,
	string relativePath = null,
	FileDataFormat dataFormat,
	AsyncHandle asyncHandle = null
)

Public Function GetFileTablesExAsync ( 
	connectionId As String,
	Optional relativePath As String = Nothing,
	dataFormat As FileDataFormat,
	Optional asyncHandle As AsyncHandle = Nothing
) As Task(Of IEnumerable(Of DataTableEx))