code: public static void plus(Complex_F64 a , Complex_F64 b , Complex_F64 result ) {
          result.real = a.real + b.real;
          result.imaginary = a.imaginary + b.imaginary;
      }
docs: <p>
  Addition: result = a + b
  </p>
  
  @param a Complex number. Not modified.
  @param b Complex number. Not modified.
  @param result Storage for output