Component instances added to an `Assembler` do not add their group name to the resulting `Instr`

[g5t]

from mccode_antlr.assembler import Assembler

assembler = Assember(...)
assembler.component(
    'named', 'Type', at=[(x, y, z), 'absolute']
    parameters={...}
).GROUP('someGroup')

instr =  assembler.instrument

Will fail at translation time due to instr.determine_groups() not being called.

The quick fix is to remember to call that method after all group-member components are added and before translating the Instr.
A better fix would eliminate the need for this call, possibly by making Assembler.instrument a @property.