module T::Private::ErrorHandler

def self.handle_sig_builder_error(error, location)

is unset, this method will call handle_sig_builder_error_default.
when a sig decl fails. If T::Configuration.sig_builder_error_handler
Handle a sig declaration failure. This allows users to override the behavior 
def self.handle_sig_builder_error(error, location)
  T::Configuration.sig_builder_error_handler(error, location)
  nil
end