Returns whether the player is interacting with a Stable Master NPC. The Pet Stable UI/API can be active without an NPC if the player is using the Call Stabled Pet ability. New stable slots can only be purchased while talking to an NPC -- the default UI uses this function to determine whether to show UI elements related to purchasing slots.
See also Pet Stable functions.
isAtNPC- True if the player is interacting with a Stable Master NPC; otherwise false (