@spiceErrorCheck<EOL>def gfsstp(step):
step = ctypes.c_double(step)<EOL>libspice.gfsstp_c(step)<EOL>
Set the step size to be returned by :func:`gfstep`.

http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/gfsstp_c.html

:param step: Time step to take.
:type step: float