def register_vcs(vcs_type, clazz):
    _VCS_TYPES[vcs_type] = clazz
@todo: docstring
dataset/ETHPy150Open vcstools/vcstools/src/vcstools/vcs_abstraction.py/register_vcs--crossover with--dataset/ETHPy150Open sahana/eden/modules/s3db/survey.py/survey_DataMatrixBuilder.addLabel