a first function example XXX

Description:

     This really is just an example, the function prints
     ‘utils::head()’ and ‘utils::str()’ of the given ‘data.frame’.

Usage:

     a_first_function(df)
     
Arguments:

      df: Name of a data.frame to ... do whatever needs to be done.

Value:

     NULL. This is no good.

Examples:

     data(iris, package = "datasets")
     a_first_function(iris)
     
