class ActionDispatch::MiddlewareStack

def assert_index(index, where)

Experimental RBS support (using type sampling data from the type_fusion project). 

def assert_index: (Class index, Symbol where) -> Integer

This signature was generated using 1 sample from 1 application. 

def assert_index(index, where)
  i = index.is_a?(Integer) ? index : index_of(index)
  raise "No such middleware to insert #{where}: #{index.inspect}" unless i
  i
end