Method patch

external/.scrollLibs.js:15514–15522

(two)

  // in this particle that start with the same particle from the first particle with
  // that patched version. Does not recurse.
  patch(two) {
    const copy = this.clone()
    two.forEach(particle => {
      const hit = copy.getParticle(particle.getAtom(0))
      if (hit) hit.destroy()
    })
    copy.concat(two)
    return copy
  }
  getSparsity() {
    const particles = this.getSubparticles()
    const fields = this._getUnionNames()