Currently, I'm working on odoo v12. 

 Can anyone help me to inherit the following functions from odoo? 

 -  account/static/src/js/section_and_note_fields_backend.js  (_renderBodyCell function)                                                        

 -  web/static/src/js/views/list/list_renderer.js (_renderHeaderCell function) 

 I want to add some extra functionality in that function.

  Thanks in advance.