Function assertSymbolNodeType

src/parseNode.ts:25–33

(node: AnyParseNode | null | undefined)

 * returns null.
 */
export function assertSymbolNodeType(node: AnyParseNode | null | undefined): SymbolParseNode {
    const typedNode = checkSymbolNodeType(node);
    if (!typedNode) {
        throw new Error(
            `Expected node of symbol group type, but got ` +
            (node ? `node of type ${node.type}` : String(node)));
    }
    return typedNode;
}

/**
 * Returns the node more strictly typed if it is of the given type. Otherwise,