bool has(string $id) Returns true if the given service is defined.

bool hasAlias(string $id) Returns true if an alias exists under the given identifier.

setRepeatedPass(

setDefinitions(array $definitions) Sets the service definitions.

string|null getClass() Gets the service class.

Definition setAutowiringTypes(array

ResourceInterface[]

string[] getAutowiringTypes() Gets autowiring types that will default to this definition.

array getOptimizationPasses() Gets all passes for the Optimization pass.

bool isPublic() Checks if this DI Alias should be public or not.