method PixelCollection._mapimport { PixelCollection } from "https://deno.land/x/imagemagick_deno@0.0.14/src/pixels/pixel-collection.ts"; _map(image: IMagickImage,mapping: string,func: (instance: number) => void,): voidParametersimage: IMagickImagemapping: stringfunc: (instance: number) => voidReturnsvoid