(PECL xlswriter >= 1.2.1)
Create a cell format object
Vtiful\Kernel\Format::FORMAT_ALIGN_LEFT Vtiful\Kernel\Format::FORMAT_ALIGN_CENTER Vtiful\Kernel\Format::FORMAT_ALIGN_RIGHT Vtiful\Kernel\Format::FORMAT_ALIGN_FILL Vtiful\Kernel\Format::FORMAT_ALIGN_JUSTIFY Vtiful\Kernel\Format::FORMAT_ALIGN_CENTER_ACROSS Vtiful\Kernel\Format::FORMAT_ALIGN_DISTRIBUTED Vtiful\Kernel\Format::FORMAT_ALIGN_VERTICAL_TOP Vtiful\Kernel\Format::FORMAT_ALIGN_VERTICAL_BOTTOM Vtiful\Kernel\Format::FORMAT_ALIGN_VERTICAL_CENTER Vtiful\Kernel\Format::FORMAT_ALIGN_VERTICAL_JUSTIFY Vtiful\Kernel\Format::FORMAT_ALIGN_VERTICAL_DISTRIBUTED Vtiful\Kernel\Format::UNDERLINE_SINGLE Vtiful\Kernel\Format::UNDERLINE_DOUBLE Vtiful\Kernel\Format::UNDERLINE_SINGLE_ACCOUNTING Vtiful\Kernel\Format::UNDERLINE_DOUBLE_ACCOUNTING