Argument: filename: string: None
relative path to file
The main script remains the one that named after the last component of the identifier.
Other script (dependencies), can be loaded inline the current script using the
loadScript("my-other-script.js") will load the
my-other-script.js script, provided it is located in the same Extension directory).
Important! This function does not return the imported module, use
require() if you wish to have a return value (similar to Node.js/CommonJS).