Quaternion.opOpAssign - multiple declarations
Function Quaternion.opOpAssign
Quaternion!(T) += Quaternion!(T)
Function Quaternion.opOpAssign
Quaternion!(T) -= Quaternion!(T)
Function Quaternion.opOpAssign
Quaternion!(T) *= Quaternion!(T)
Function Quaternion.opOpAssign
Quaternion!(T) *= T
Function Quaternion.opOpAssign
Quaternion!(T) /= T
Function Quaternion.opOpAssign
Quaternion!(T) *= Vector!(T,3)