@Override
	public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
		return visitor.visitErrorNode(this);
	}
Represents a token that was consumed during resynchronization
 rather than during a valid match operation. For example,
 we will create this kind of a node during single token insertion
 and deletion as well as during "consume until error recovery set"
 upon no viable alternative exceptions.
runtime/Java/src/org/antlr/v4/runtime/tree/ErrorNodeImpl.java