Check that a method is callable via dRuby.
obj is the object we want to invoke the method on. msg_id is the method name, as a Symbol.
If the method is an insecure method (see insecure_method?) a SecurityError is thrown. If the method is private or undefined, a NameError is thrown.
Returns integer 443, the default port to use for HTTPS requests:
Net::HTTP.https_default_port # => 443
Visit the child nodes of the given node.
Compile a SymbolNode node
Dispatch enter and leave events for SymbolNode nodes and continue walking the tree.
Copy a SymbolNode node