With two or more nodes, get the set of common neighboring nodes.

## Arguments

- graph
A graph object of class

`dgr_graph`

.- nodes
a vector of node ID values of length at least 2.

## Examples

```
# Create a directed graph with 5 nodes
graph <-
create_graph() %>%
add_path(n = 5)
# Find all common neighbor nodes
# for nodes `1` and `2` (there are no
# common neighbors amongst them)
graph %>%
get_common_nbrs(
nodes = c(1, 2))
#> [1] NA
# Find all common neighbor nodes for
# nodes `1` and `3`
graph %>%
get_common_nbrs(
nodes = c(1, 3))
#> [1] 2
```