class Prism::DotVisitor

def visit_numbered_reference_read_node(node)

Visit a NumberedReferenceReadNode node. 
def visit_numbered_reference_read_node(node)
  table = Table.new("NumberedReferenceReadNode")
  id = node_id(node)
  # number
  table.field("number", node.number.inspect)
  digraph.nodes << <<~DOT
    #{id} [
      label=<#{table.to_dot.gsub(/\n/, "\n  ")}>
    ];
  DOT
  super
end