const COL_SAMPLER_NAME = :sampler_name
const COL_NUM_METAINFERENCE = :num_metainference
const COL_NUM_PARTICLES = :num_particles
const COL_NUM_REJUVENATION = :num_rejuvenation
const COL_NUM_MCMC_ITERS = :num_mcmc_iters
const COL_NUM_SGD_ITERS = :num_sgd_iters
const COL_AIDE_ESTIMATE = :aide_estimate
const COL_AIDE_STDERR = :aide_estimate_standard_error
const COL_MEDIAN_RUNTIME = :median_runtime
