class Spec::Example::Configuration

def prepend_before(*args, &proc)

See #append_before for filtering semantics.
Prepends a global before block to all example groups. 
def prepend_before(*args, &proc)
  scope, options = scope_and_options(*args)
  example_group = ExampleGroupFactory.get(
    get_type_from_options(options)
  )
  example_group.prepend_before(scope, &proc)
end