How to use the yaml-ast-parser.parseYamlBoolean function in yaml-ast-parser

case Yaml.ScalarType.null: {
						return new StringASTNode(
							this,
							parent,
							name,
							false,
							instance.startPosition,
							instance.endPosition
						)
					}
					case Yaml.ScalarType.bool: {
						return new BooleanASTNode(
							this,
							parent,
							name,
							Yaml.parseYamlBoolean(value),
							node.startPosition,
							node.endPosition
						)
					}
					case Yaml.ScalarType.int: {
						const result = new NumberASTNode(
							this,
							parent,
							name,
							node.startPosition,
							node.endPosition
						)
						result.value = Yaml.parseYamlInteger(value)
						result.isInteger = true
						return result
					}

const instance = node as Yaml.YAMLScalar;
      const type = Yaml.determineScalarType(instance);
      const value = instance.value;
      switch (type) {
        case Yaml.ScalarType.null: {
          return new StringASTNode(
            parent,
            false,
            instance.startPosition,
            instance.endPosition,
          );
        }
        case Yaml.ScalarType.bool: {
          return new BooleanASTNode(
            parent,
            Yaml.parseYamlBoolean(value),
            instance.startPosition,
            instance.endPosition,
          );
        }
        case Yaml.ScalarType.int: {
          const result = new NumberASTNode(
            parent,
            instance.startPosition,
            instance.endPosition,
          );
          result.value = Yaml.parseYamlInteger(value);
          result.isInteger = true;
          return result;
        }
        case Yaml.ScalarType.float: {
          const result = new NumberASTNode(