NewBatchExecutor creates a new instance of BatchExecutor with the specified execute function that defines how each batch of requests is processed.

NewIntegerBatchExecutor creates a new instance of BatchExecutor with integer requests.

NewStringBatchExecutor creates a new instance of BatchExecutor with string requests.

BatchExecutor manages the execution of batches of requests ensuring that each unique request is processed only once concurrently.

ExecuteFunc is a generic function type that processes a batch of requests of type K and returns results of type T.