If you would like to target a portion of a placed group - or a portion of a placed group - and assign it to a new variable, you can use the copy() method. You can also deactivate the targeted items in the original, giving the impression that the original object is being affected.
// Place item
const placedGroup = this.P2P.place(this, "psd_key", "placedGroup");
// Use target to apply method to portion of target
const lightened = placedGroup.target("iAmAtlas").setAlpha(0.3);
// Chain several methods on target
placedGroup.target("surround").setAlpha(0.3).setX(200); // chain methods
// Assign target to a new variable and update it that way.
const = L1Text = placedGroup.target("depthTest/Level1/Level1Text");
L1Text.setAlpha(0.3)
// Get the points which make up a placed Zone
const zone = placedGroup.target("depthTest/zone1");
const points = zone.getData('points');