T Update<T>(
	T obj,
	ITransaction tx,
	long leaseTime,
	long timeout,
	UpdateModifiers modifiers
)

Function Update(Of T) ( _
	obj As T, _
	tx As ITransaction, _
	leaseTime As Long, _
	timeout As Long, _
	modifiers As UpdateModifiers _
) As T

generic<typename T>
T Update(
	T obj, 
	ITransaction^ tx, 
	long long leaseTime, 
	long long timeout, 
	UpdateModifiers modifiers
)

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