Method _endBlockNode

docs/scripts/ajv-validator.js:1315–1322

(N1, N2)

                    this._nodes.push(node);
                }
                _endBlockNode(N1, N2) {
                    const n = this._currNode;
                    if (n instanceof N1 || (N2 && n instanceof N2)) {
                        this._nodes.pop();
                        return this;
                    }
                    throw new Error(`CodeGen: not in block "${N2 ? `${N1.kind}/${N2.kind}` : N1.kind}"`);
                }
                _elseNode(node) {
                    const n = this._currNode;
                    if (!(n instanceof If)) {