AsUnion returns a [ProxyConfigRulesAzureUnion] interface which you can cast to.
func (r ProxyConfigRulesAzure) AsUnion() ProxyConfigRulesAzureUnionAsUnion returns a [ProxyConfigRulesAzureUnion] interface which you can cast to the specific types for more type safety.
Possible runtime types of the union are [ProxyConfigRulesAzureSandboxesProxyAzureWorkloadIdentityConfig], [ProxyConfigRulesAzureSandboxesProxyAzureAccountKeyConfig], [ProxyConfigRulesAzureSandboxesProxyAzureSasConfig].