neighborhood: vector for the probability of choosing a particular transition in the chain
fixed.estimates: if some parameters are fixed, list with as many elements as effects, these elements equal a fixed value if needed, or NULL if they should be estimated
numgroups.allowed: vector containing the number of groups allowed in the partition (now, it only works with vectors like num_min:num_max)
numgroups.simulated: vector containing the number of groups simulated
sizes.allowed: vector of group sizes allowed in sampling (now, it only works for vectors like size_min:size_max)
sizes.simulated: vector of group sizes allowed in the Markov chain but not necessarily sampled (now, it only works for vectors like size_min:size_max)
parallel: boolean to indicate whether the code should be run in parallel
cpus: number of cpus if parallel = TRUE
verbose: logical: should intermediate results during the estimation be printed or not? Defaults to FALSE.