negate method Null safety

void negate()

Negate this.

Implementation

void negate() {
  _m2storage[0] = -_m2storage[0];
  _m2storage[1] = -_m2storage[1];
  _m2storage[2] = -_m2storage[2];
  _m2storage[3] = -_m2storage[3];
}