Constant ACCEPT_AGGREGATED_DISCOVERY_V2 

pub const ACCEPT_AGGREGATED_DISCOVERY_V2: &str = "application/json;g=apidiscovery.k8s.io;v=v2;as=APIGroupDiscoveryList,application/json;g=apidiscovery.k8s.io;v=v2beta1;as=APIGroupDiscoveryList,application/json";

Content negotiation Accept header for Aggregated Discovery API v2