export const transform = (source: Record<string, any>): Record<string, any> => {
    const target: Record<string, any> = Object.create(null);
  
    for (let [key, value] of Object.entries(source)) {
      const lastUnderscoreIndex = key.lastIndexOf("_");
      
      const keyValid = key.length > 1;
      const valueKey = keyValid ? key.slice(lastUnderscoreIndex + 1) : key;
      
      let deepestNode = target;
      if (keyValid) {
        deepestNode = key.split("_")
          .slice(0, -1)
          .reduce((node: Record<string, any>, element: string) => node[element] ??= {}, target);
      }
      
      if (valueKey === '_') {
        //  dont get why it should be value_d but ok  
        value = 'value_d';
      }
      
      deepestNode[valueKey] = value;
    }
    return target;
}