title: Could I use one Google script to multiple spreadsheets
body: <p>Here I am asking a question of google spreadsheet and google script.
  As when we copy the spreadsheet, the google script code will also be copied.
  While I have several templates for different cases and the structure of them is quite similar. What I want to ask is it possible to link all the script code for all the template together, like temp A's code is A1 and temp B's code is A2, A1 and A2 are same and if I make some change in A1, A2 will be updated automatically.</p>
  
  <p>Thank you.</p>