code: public Cell<C,T> space (float space) {
  		if (space < 0) throw new IllegalArgumentException("space cannot be < 0.");
  		Value<C,T> value = new FixedValue<C, T>(layout.toolkit,space);
  		spaceTop = value;
  		spaceLeft = value;
  		spaceBottom = value;
  		spaceRight = value;
  		return this;
  	}
docs: Sets the spaceTop, spaceLeft, spaceBottom, and spaceRight to the specified value.