Returns whether the player character is swimming.
isSwimming = IsSwimming()
- boolean - 1 if the player is swimming, nil otherwise.
- A swimming character's movement speed is based on their swim speed (per GetUnitSpeed).
- In some locations and when affected by certain effects, player characters can run at the bottom of the ocean/lake/etc. In those cases, the player is not considered swimming (but is still submerged per IsSubmerged).
- This function is available within the RestrictedEnvironment