@atlaskit/editor-common/dist/es2019/utils/scroll-gutter.js

A package that contains common classes and components for editor and renderer

export const GUTTER_SIZE_IN_PX = 120; // Default gutter size
export const GUTTER_SIZE_MOBILE_IN_PX = 36; // Gutter size for Mobile
export const GUTTER_SELECTOR = '#editor-scroll-gutter';