Currently, I can obtain an array of all Materials using Material.values(), but unfortunately this includes all the legacy materials. There is no stable way of obtaining a list of all materials without including the legacy materials in your list, because the isLegacy() method on Material is deprecated with a comment saying "do not use for any reason". AFAIK the name of the legacy materials isn't stable either so I can't use material.name().startsWith("LEGACY_").

This is the only use-case I can think of where I am tempted to use isLegacy(), so please can you add an API to list all (non-legacy) materials without needing to call this method?