Method _insertLines

external/.scrollLibs.js:16608–16617

(lines, index = this.length)

    return newParticle
  }
  _insertLines(lines, index = this.length) {
    const parser = this.constructor
    const newParticle = new parser()
    if (typeof lines === "string") newParticle._appendSubparticlesFromString(lines)
    const adjustedIndex = index < 0 ? this.length + index : index
    this._getSubparticlesArray().splice(adjustedIndex, 0, ...newParticle.getSubparticles())
    if (this._cueIndex) this._makeCueIndex(adjustedIndex)
    this.clearQuickCache()
    return this.getSubparticles().slice(index, index + newParticle.length)
  }
  insertLinesAfter(lines) {
    return this.parent._insertLines(lines, this.index + 1)
  }