Values:
UNDEFINED_LOAD_BALANCING_SCHEMES (0):
A value indicating that the enum field is not
set.
EXTERNAL (35607499):
Signifies that this will be used for classic
Application Load Balancers.
EXTERNAL_MANAGED (512006923):
Signifies that this will be used for
Envoy-based global external Application Load
Balancers.
LOAD_BALANCING_SCHEME_UNSPECIFIED (526507452):
If unspecified, the validation will try to
infer the scheme from the backend service
resources this Url map references. If the
inference is not possible, EXTERNAL will be used
as the default type.
