code: func importBreakPaths(file *ast.File) []string {
  	var output []string
  
  	for _, decl := range file.Decls {
  		if gen, ok := decl.(*ast.GenDecl); ok && gen.Tok == token.IMPORT {
  			for srcIndex, currSpec := range gen.Specs {
  				if srcIndex > 0 {
  					// if there was a previous element, check if the group has changed
  					currGroup := importGroup(importPath(currSpec))
  					prevGroup := importGroup(importPath(gen.Specs[srcIndex-1]))
  					if currGroup != prevGroup {
  						// if group has changed, add path to the output
  						output = append(output, importPath(gen.Specs[srcIndex]))
  					}
  				}
  			}
  
  			// assume that only one import token block exists
  			break
  		}
  	}
  
  	return output
  }
docs: // importBreakPaths returns a slice that contains the import paths before which a line breaks should be inserted.