Purpose(value)The purpose of the resource. This field can be either PRIVATE_RFC_1918 or INTERNAL_HTTPS_LOAD_BALANCER. A subnetwork with purpose set to INTERNAL_HTTPS_LOAD_BALANCER is a user-created subnetwork that is reserved for Internal HTTP(S) Load Balancing. If unspecified, the purpose defaults to PRIVATE_RFC_1918. The enableFlowLogs field isn't supported with the purpose field set to INTERNAL_HTTPS_LOAD_BALANCER.
Values: UNDEFINED_PURPOSE (0): A value indicating that the enum field is not set. INTERNAL_HTTPS_LOAD_BALANCER (248748889): Subnet reserved for Internal HTTP(S) Load Balancing. PRIVATE (403485027): Regular user created or automatically created subnet. PRIVATE_RFC_1918 (254902107): Regular user created or automatically created subnet. PRIVATE_SERVICE_CONNECT (48134724): Subnetworks created for Private Service Connect in the producer network. REGIONAL_MANAGED_PROXY (153049966): Subnetwork used for Regional Internal/External HTTP(S) Load Balancing.