Function AppendToOutputChannel 

pub fn AppendToOutputChannel(
    ChannelIdentifier: String,
    Value: String,
) -> ActionEffect<Arc<dyn OutputChannelManager>, CommonError, ()>

Creates an effect that, when executed, will append a string to the specified output channel’s buffer.

It uses the OutputChannelManager capability from the environment.

Parameters

• ChannelIdentifier: The unique ID of the target channel.
• Value: The string content to append.

Returns

An ActionEffect that resolves to () on success.