Tolan/frontend/node_modules/styled-components/dist/utils/mixinDeep.d.ts

/**
 * Arrays & POJOs merged recursively, other objects and value types are overridden
 * If target is not a POJO or an Array, it will get source properties injected via shallow merge
 * Source objects applied left to right.  Mutates & returns target.  Similar to lodash merge.
 */
export default function mixinDeep(target: any, ...sources: any[]): any;