Functions used to determine graph layout.
Calling the function with no parameters returns available function names.
Calling the function with only the name of a function returns that function.
Supplying a name and a graph object to run the layout function on the graph.
# NOT RUN {# List available function names:layout_functions()
# Execute layout function on graph:layout_functions("davidson-harel", igraph::make_ring(5))
# }