Method appendAtomIfMissing

external/.scrollLibs.js:17448–17451

(atom)

    return new Set(this.getAtomsFrom(1))
  }
  appendAtomIfMissing(atom) {
    if (this.getAtomsAsSet().has(atom)) return this
    return this.appendAtom(atom)
  }
  // todo: check to ensure identical objects
  addObjectsAsDelimited(arrayOfObjects, delimiter = Utils._chooseDelimiter(new Particle(arrayOfObjects).toString())) {
    const header = Object.keys(arrayOfObjects[0])