declare namespace Ext {
    export class Number   {
        public isFinite?: any;
        public clipIndices?(length?: number, indices?: number[], options?: object): number[];
        public constrain?(number?: number, min?: number, max?: number): number;
        public correctFloat?(n?: number): number;
        public from?(value?: object, defaultValue?: number): number;
        public isEqual?(n1?: number, n2?: number, epsilon?: number): boolean;
        public log10?(x?: number): number;
        public randomInt?(from?: number, to?: number): number;
        public roundToNearest?(value?: number, interval?: number): number;
        public sign?(x?: number): number;
        public snap?(value?: number, increment?: number, minValue?: number, maxValue?: number): number;
        public snapInRange?(value?: number, increment?: number, minValue?: number, maxValue?: number): number;
        public toFixed?(value?: number, precision?: number): void;
    }
}