Hi Team, in langchain we have the

Hi Team, in langchain we have the following runnable functions, do we have anything similar to this, like runnabel functions in llamaindex - @abstractmethod
def invoke(self, input: Input, config: Optional[RunnableConfig] = None) -> Output:
"""Transform a single input into an output. Override to implement.

Args:
input: The input to the Runnable.
config: A config to use when invoking the Runnable.
The config supports standard keys like 'tags', 'metadata' for tracing
purposes, 'max_concurrency' for controlling how much work to do
in parallel, and other keys. Please refer to the RunnableConfig
for more details.

Returns:
The output of the Runnable.
"""