PresetManager methods not declared as static in gantt.d.ts

[jsakalos]

Reported here: https://www.bryntum.com/forum/viewtopic.php?f=44&t=12958#p67760

PresetManager is a singleton but its methods are not declared as static in gantt.d.ts:

export class PresetManager extends PresetStore {  
        registerPreset(id: string, config: object): ViewPreset;
        normalizePreset(presetOrId: string|object): ViewPreset;
        deletePreset(id: string): void;
    }

The result is that TypeScript does not find these methods:

[jsakalos]

This is deeper seated than I originally thought. The problem here is that for singletons we create instances of the classes but the documentation is written for class definitions. Typescript however, does not know that we have created the instance of the class and, because the methods are not originally static, it does not recognize the singleton methods.

In other words:

import { PresetManager } from 'bryntum-scheduler'; // imports PresetManager instance

PresetManager.registerLocale(...) // typescript thinks that we're working with the PresetManager class

We would need:

    export class PresetManager extends PresetStore {        
        static registerPreset(id: string, config: object): ViewPreset;
        static normalizePreset(presetOrId: string|object): ViewPreset;
        static deletePreset(id: string): void;
    }

in scheduler.d.ts however without really declaring singleton methods as statics.

All singletons (e.g. LocaleManager) are affected by this.