Subtracts the given vector or values from this one, and returns self for chaining
overload 1:
Vector2:sub(vec)
| Method Property | Fluent Description | Representation |
| vec accepts | a Vector2 | |
| Return Value | a Vector2 | |
overload 2:
Vector2:sub(x, y)
| Method Property | Fluent Description | Representation |
| x accepts | a Number | |
| y accepts | a Number | |
| Return Value | a Vector2 | |