class ActiveSupport::Duration

def is_a?(klass) # :nodoc:

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

def is_a?: (Class klass) -> true

This signature was generated using 1 sample from 1 application.

:nodoc: 
def is_a?(klass) # :nodoc:
  Duration == klass || value.is_a?(klass)
end