composer req neuedaten/svg-embed
{namespace neuedaten=Neuedaten\SvgEmbed\ViewHelpers}
<neuedaten:svgEmbed src="EXT:your_extension/Resources/Public/Images/filename.svg"/>
<neuedaten:svgEmbed src="{falObject}" srcType="FAL_OBJECT"/>
<neuedaten:svgEmbed src="{id}" srcType="FAL_ID"/>
(an array like you get some times in a flux template)
<neuedaten:svgEmbed src="{array}" srcType="ARRAY"/>