Function preventSubstitution

test/fixtures/snapshot/typescript.js:107310–107315

* Prevent substitution of a node for this transformer. * * @param node The node which should not be substituted.

(node)

         * @param node The node which should not be substituted.
         */
        function preventSubstitution(node) {
            if (noSubstitution === undefined)
                noSubstitution = [];
            noSubstitution[ts.getNodeId(node)] = true;
            return node;
        }
        /**
         * Determines whether a node should not be substituted.
         *