class Rails::TestUnit::Runner

def compose_filter(runnable, filter)

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

def compose_filter: (Class runnable, nil filter) -> nil

This signature was generated using 11 samples from 1 application. 

def compose_filter(runnable, filter)
  if filters.any? { |_, lines| lines.any? }
    CompositeFilter.new(runnable, filter, filters)
  else
    filter
  end
end