function isOrCanBeConvertedToShorthand(node) {
    if (isAttributeShorthand(node.value)) {
        return true;
    }
    if (isLoneMustacheTag(node.value)) {
        const expression = node.value[0].expression;
        return expression.type === 'Identifier' && expression.name === node.name;
    }
    return false;
}
True if node is of type `{a}` or `a={a}`