docs: @SuppressWarnings("deprecation")
  	public final void setValidatedNodeType(SqlNode node, RelDataType type) {
  		Objects.requireNonNull(type);
  		Objects.requireNonNull(node);
  		if (type.equals(unknownType)) {
  			// don't set anything until we know what it is, and don't overwrite
  			// a known type with the unknown type
  			return;
  		}
  		nodeToTypeMap.put(node, type);
  	}