in tools/tslint-rules/validateDecoratorsRule.ts [58:67]
visitClassDeclaration(node: ts.ClassDeclaration) {
if (this._enabled && node.decorators) {
node.decorators
.map(decorator => decorator.expression as any)
.filter(expression => expression.arguments.length && expression.arguments[0].properties)
.forEach(expression => this._validatedDecorator(expression));
}
super.visitClassDeclaration(node);
}