aspect LanguageExtensions {
	public abstract class LanguageExtension {
		private String name;
		
		public LanguageExtension(String name) { 
			this.name = name;
		}
		
		public String toString() {
			return name;
		}
		
		public abstract void eliminateOn(ASTNode node);
	}

	public void ASTNode.eliminate(LanguageExtension... les) {
		flushCaches();
		for(LanguageExtension le : les) {
			le.eliminateOn(this);
		}
	}
}