Examples for datatypes of records from prometheus_scrape, exec and proc input plugins

Hi,

Currently we are using tail plugin and we use '[]map[interface{}]interface{}' datatype to get the extracted records from tail input plugin.

Do you have any examples of the extracted records' datatype for the prometheus_scrape, exec and proc input plugins?
Or do you have any code examples of FLBPluginFlush for any of these input plugins?
Any references would be very helpful.