public Expression Speedup(Expression ratio) => speedup.InstanceOf(this, ratio);
public Ex DeleteSB(Ex index) => delete.InstanceOf(this, index);
public TExPI CopyWithT(Ex newT) => new TExPI(copyWithT.InstanceOf(this, newT));
public Ex FlipSimpleY(Ex wall) => flipSimple.InstanceOf(this, Ex.Constant(true), wall);
public TExPI Rehash() => new TExPI(rehash.InstanceOf(this));