Method _mount

external/.scrollLibs.js:24696–24703

(stumpParticleToMountOn, index)

 id ${this.getParticleComponentId()}`
  }
  _mount(stumpParticleToMountOn, index) {
    this._setLastRenderedTime(this._getProcessTimeInMilliseconds())
    this.particleComponentWillMount()
    this._mountCss()
    this._mountHtml(stumpParticleToMountOn, this._toLoadedOrLoadingStumpCode(), index) // todo: add index back?
    this._lastTimeToRender = this._getProcessTimeInMilliseconds() - this._getLastRenderedTime()
    return this
  }
  // todo: we might be able to squeeze virtual dom in here on the mountCss and mountHtml methods.
  _mountCss() {
    const css = this._css