How to change loader.js code to refer to local .js

[Keny]

Dear all,

I include loader.js to create piechart.

With my server being unable to go to internet, I would like to modify code retrieving external source  

prefix:"https://www.gstatic.com/charts",debug:"{prefix}/debug/{version}/jsapi_debug_{package}_module.js",compiled:"{prefix}/{version}/js/jsapi_compiled_{package}_module.js",i18n:"{prefix}/{version}/i18n/jsapi_compiled_i18n_{package}_module__{language}.js

to refer to local js file source.But with these syntax like {prefix}, "compiled" etc.
Is it possible I download a some .js somewhere so that it can be sourced locally but through internet.?

Any ideas?

source:https://www.gstatic.com/charts/45.1/loader.js

Thanks.