NaryOperatorNode constructor
      
      NaryOperatorNode({ 
    
    
- required String operator,
- required EquationRowNode? lowerLimit,
- required EquationRowNode? upperLimit,
- required EquationRowNode naryand,
- bool? limits,
- bool allowLargeOp = true,
Implementation
NaryOperatorNode({
  required this.operator,
  required this.lowerLimit,
  required this.upperLimit,
  required this.naryand,
  this.limits,
  this.allowLargeOp = true,
});