API C Traits.CanPurchaseRank

Checks whether a node entry is purchasable.
 canPurchase = C_Traits.CanPurchaseRank(configID, nodeID, nodeEntryID)
==Arguments==
:;configID:
:;nodeID:
:;nodeEntryID:
==Returns==
:;canPurchase:
==Details==
There is generally little value in calling this API, instead, you can call or directly, and check their return values.
Currently, the default UI only uses this API for profession nodes, to check whether unlocking a node, or spending points on the node is possible, and not for generic talents or class talents.