method MagickImage.prototype.privateSigmoidalContrastRe-exportimport { MagickImage } from "https://deno.land/x/imagemagick_deno@0.0.19/mod.ts"; privateSigmoidalContrast(sharpen: boolean,contrast: number,midpointOrPercentage?: number | Percentage,channelsOrUndefined?: Channels,): voidParameterssharpen: booleancontrast: numberoptionalmidpointOrPercentage: number | PercentageoptionalchannelsOrUndefined: ChannelsReturnsvoid