https://openjfx.io/javadoc/25/jfx.incubator.richtext/jfx/incubator/scene/control/richtext/model/BasicTextModel.Content.html
BasicTextModel.Content (JavaFX 25)
declaration: module: jfx.incubator.richtext, package: jfx.incubator.scene.control.richtext.model, class: BasicTextModel, interface: Content
contentjavafx