static public RectInt WithSizeExpandedPivotAtCenter( this RectInt beforeExpansion, int expansion) => beforeExpansion.WithSizeExpandedPivotAtCenter(new Vektor2DInt(expansion, expansion));
static public RectInt WithSizeExpandedPivotAtCenter( this RectInt BeforeExpansion, int Expansion) => BeforeExpansion.WithSizeExpandedPivotAtCenter(new Vektor2DInt(Expansion, Expansion));