code: public Vector4f set(Vector4fc v) {
          if (v instanceof Vector4f) {
              MemUtil.INSTANCE.copy((Vector4f) v, this);
          } else {
              this.x = v.x();
              this.y = v.y();
              this.z = v.z();
              this.w = v.w();
          }
          return this;
      }
docs: Set this {@link Vector4f} to the values of the given <code>v</code>.
  
  @param v
  the vector whose values will be copied into this
  @return this