Javadoc for PixelFormat class has a number of methods without javadoc:

method javafx.scene.image.PixelFormat.getIntArgbInstance()
method javafx.scene.image.PixelFormat.getIntArgbPreInstance()
method javafx.scene.image.PixelFormat.getByteBgraInstance()
method javafx.scene.image.PixelFormat.getByteBgraPreInstance()
method javafx.scene.image.PixelFormat.getByteRgbInstance()
method javafx.scene.image.PixelFormat.createByteIndexedPremultipliedInstance(int[])
method javafx.scene.image.PixelFormat.createByteIndexedInstance(int[])
method javafx.scene.image.PixelFormat.getType()
method javafx.scene.image.PixelFormat.isWritable()
method javafx.scene.image.PixelFormat.isPremultiplied()