code: public Packer inset(final int top, final int left, final int bottom, final int right) {
          gc.insets = new Insets(top, left, bottom, right);
          setConstraints(comp, gc);
          return this;
      }
docs: Specify the insets for the component.
  
  @param left
  the inset from the left.
  @param top
  the inset from the top.
  @param right
  the inset from the right.
  @param bottom
  the inset from the bottom.