class Prism::Translation::Parser::Compiler

def visit_missing_node(node)

we invent our own here.
case of a syntax error. The parser gem doesn't have such a concept, so
A node that is missing from the syntax tree. This is only used in the 
def visit_missing_node(node)
  ::AST::Node.new(:missing, [], location: ::Parser::Source::Map.new(srange(node.location)))
end