I have an Excel Input and that excel file contains information in the header row that I need to process individually. How can I filter only the first row? I see a component named "Identify last row in a stream", but I don't see something like "Identify first row in a stream"

The point is that I need to read one column from header, the name of that column contains an important data to store it in a place without affect the rests of the row of the main flow of data.