All types registered with TypeTools[AddType] are returned as a list of names.

This function cannot be used to retrieve built-in types.

$\mathrm{TypeTools}\left[\mathrm{AddType}\right]\left('\mathrm{Type1}'\,\mathrm{identical}\left(1\right)\right)$

$\mathrm{TypeTools}\left[\mathrm{AddType}\right]\left('\mathrm{Type2}'\,\mathrm{identical}\left(2\right)\right)$

$\mathrm{TypeTools}\left[\mathrm{GetTypes}\right]\left(\right)$

$\left[\mathrm{Type1}\,\mathrm{Type2}\right]$