export type NumberKeys<O> = {
    [K in keyof O]: number extends O[K] ? K : never
}[keyof O];

export type ArrayKeys<O, P = any> = {
    [K in keyof O]: P[] extends O[K] ? K : never
}[keyof O];

export type Value<O, V = ''> = {
    [K in keyof O]: V
};

export type Projection<O> = (string & keyof O)[];