import java.util.*; import Jakarta.util.FixDosOutputStream; import java.io.*; public abstract class AstListNode { public void setSource( String s ) { AstNode.fatalError( "AstListNode.setSource( s ) method should not be called" ); } public void compose( AstNode etree ) { AstNode.fatalError( "AstListNode.cmpose(etree) method should " + "not be called" ); } }