Finding the center of a group with MAGMA

Given a finitely presented group $G = \langle S | R \rangle$, is there a command in MAGMA that computes the center of G ?

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If Center() won't work on G, you can use one of the functions available to covert G into a group of a type on which Center() will work. –  mt_ Sep 20 '11 at 21:52
This is unlikely to be possible unless $G$ is finite, in which case you should use a command like CosetImage to convert it to a group of permutations. –  Derek Holt Sep 21 '11 at 8:50