declare namespace org {
    namespace slf4j {
        namespace helpers {
            class Util {
                public static safeGetSystemProperty(arg0: java.lang.String | string): string
                public static safeGetBooleanSystemProperty(arg0: java.lang.String | string): boolean
                public static getCallingClass(): java.lang.Class<any>
                public static report(arg0: java.lang.String | string, arg1: java.lang.Throwable): void
                public static report(arg0: java.lang.String | string): void
                public static class: java.lang.Class<any>
            }
        }
    }
}