Blacklist blocks of dyads from toggling in a way that propagates through combined networks
This constraint is primarily for internal use, alongside the block blacklist API implemented in block_blacklist.R, which assigns and interprets vertex and network attributes allowing certain blocks of dyads to be blacklisted in a way that will survive even network manipulations such as subgraph extraction and combining into block-diagonal using combine_networks().
# blacklist_block(block_vattr = ".ubid", # blacklist_nattr = ".block_blacklist")
block_vattr: a character string giving the name of vertex attribute containing globally unique vertex block membership IDs.blacklist_nattr: a character string giving the name of a network attribute containing the list of pairs of vertex IDs that are to be blacklisted.ergmConstraint for index of constraints and hints currently visible to the package.
ergm:::.formatTermKeywords("ergmConstraint", "blacklist_block","subsection")