# Functions
IsAlreadyExists returns true if an error returned from NestedPendingOperations indicates a new operation can not be started because an operation with the same operation name is already executing.
NewAlreadyExistsError returns a new instance of AlreadyExists error.
NewNestedPendingOperations returns a new instance of NestedPendingOperations.
# Interfaces
NestedPendingOperations defines the supported set of operations.