Region class javadoc description refers to external URLs as well as to different method and properties. All these should be converted into links.

"It can have multiple backgrounds under its contents and multiple borders around its content. By default it's a rectangle with possible rounded corners, depending on borders. It can be made into any shape by specifying the shape. It is designed to support as much of the CSS3 specification for backgrounds and borders as is relevant to JavaFX. The full specification is available at http://www.w3.org/TR/css3-background/. " <- external URL

"To implement more custom layout, a Region subclass must override computePrefWidth(), computePrefHeight(), and layoutChildren(). Note that layoutChildren is called automatically by the scene graph while executing a top-down layout pass and it should not be invoked directly by the region subclass. " <- links to method javadocs

"Region subclasses which layout their children will position nodes by setting layoutX/layoutY and do not alter translateX/translateY, which are reserved for adjustments and animation." <- links to properties javadocs