class ActionDispatch::Journey::Formatter

def missing_keys(route, parts)

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

def missing_keys: (ActionDispatch::Journey::Route route, Hash parts) -> nil

This signature was generated using 2 samples from 1 application.

Returns an array populated with missing keys if any are present. 
def missing_keys(route, parts)
  missing_keys = nil
  tests = route.path.requirements_for_missing_keys_check
  route.required_parts.each { |key|
    case tests[key]
    when nil
      unless parts[key]
        missing_keys ||= []
        missing_keys << key
      end
    else
      unless tests[key].match?(parts[key])
        missing_keys ||= []
        missing_keys << key
      end
    end
  }
  missing_keys
end