method = FindTriggerMethod( dtm, command, method );
struct DTMethod *FindTriggerMethod(
struct DTMethod *, STRPTR,
This function searches for a given trigger method in a given methods array like got from GetDTTriggerMethods.
If one of the "command" or "method" args matches an array item, this function returns a pointer to it.
Pointer to the trigger method table entry (
struct DTMethod *) or NULL if not found.