Add note about technical comments in code examples (#457)
Add note about technical comments in code examples (#457)

Change-Id: I272dd69f8188e1bfbd1d9f235d4a3e9439a846d7

Co-authored-by: pierrick <df474784b32dd401bcc15bd466f2f639c8ded6ef@google.com>
googleads/google-ads-php,googleads/google-ads-php