Examples:
API:
bessel()
beta()
gamma()
momentum()
ptc()
rigidity()
autonomize()
hamiltonian_factory()
element_factory()
drift_factory()
mapping()
vector()
quadrupole_factory()
sextupole_factory()
octupole_factory()
multipole_factory()
curvature()
dipole_factory()
vector_dipole()
vector_octupole()
vector_quadrupole()
vector_sextupole()
alignment_factory()
rx()
ry()
rz()
tx()
ty()
tz()
cavity_factory()