Read an entry matching the specified id query from the space. Blocks up to the specified timeout (if any) only if a matching entry exists and it is necessary to wait for transactional state to settle.

T ReadIfExistsById<T>(
	IdQuery<T> idQuery
)

Function ReadIfExistsById(Of T) ( _
	idQuery As IdQuery(Of T) _
) As T

generic<typename T>
T ReadIfExistsById(
	IdQuery<T>^ idQuery
)

J# supports the use of generic APIs, but not the declaration of new ones.