Method pushContentAndSubparticles

external/.scrollLibs.js:17305–17312

(content, subparticles)

    return this.insertLine(line, 0)
  }
  pushContentAndSubparticles(content, subparticles) {
    let index = this.length
    while (this.has(index.toString())) {
      index++
    }
    const line = index.toString() + (content === undefined ? "" : this.atomBreakSymbol + content)
    return this.appendLineAndSubparticles(line, subparticles)
  }
  deleteBlanks() {
    this.getSubparticles()
      .filter(particle => particle.isBlankLine())