mem_node_parent.Rdmem_node_parent() returns a direct parent of node. It is
equivalent to node$parents[[i]]$from.
mem_node_parent(node, i = NULL)
mem_node_bindings_parent(node)
mem_node_parents(node)A memtools node.
Which parent to return. If NULL, node must have a
single parent otherwise this is an error.
mem_node_parents() returns all the parents. It is equivalent to
map(node$parents, "from").
mem_node_bindings_parent() takes a pairlist as input and
returns the environment which holds onto that pairlist, either
through its frame or its hash table. If the pairlist is not part
of a frame or a hash table, NULL is returned.