class SyntaxTree::Parser

def on_lambda_var(params, locals)

on_lambda_var: (Params params, Array[ Ident ] locals) -> LambdaVar
:call-seq: 
def on_lambda_var(params, locals)
  location = params.location
  location = location.to(locals.last.location) if locals.any?
  LambdaVar.new(params: params, locals: locals || [], location: location)
end