text: /**
   * common functions that get reused, especially inside of map/reduce etc...
   */
  
  export const fn_and = (a, b) => a && b;
  export const fn_cat = (a, b) => a.concat(b);
  export const fn_def = a => a !== undefined;
  export const fn_add = (a, b) => a + b;
  
  