PHP 'use' Statement in SC

I am trying to use an external library that requires a couple of ‘use’ statements before instantiating the class. There are 2 statements in this form:

use libfolder\classname1;
use libfolder\subfolder\classname2;

These throw the error “Parse error: syntax error, unexpected ‘use’ (T_USE) in …” running it from a blank app.

Without the use statements, I get “Fatal error: Class ‘Form’ not found in…”

Is there a way to inject these ‘use’ statements in SC or some way to amend the class library to work without them?

try this:
// remark use statement
//use libfolder\classname1;
$classname1 = new libfolder\classname1();