225     let ext1 = p.header.get_extension(1);  in test_rfc_8285_one_byte_two_extension_of_two_bytes()
233     let ext2 = p.header.get_extension(2);  in test_rfc_8285_one_byte_two_extension_of_two_bytes()
298         .get_extension(1)  in test_rfc_8285_one_byte_multiple_extensions_with_padding()
306         .get_extension(2)  in test_rfc_8285_one_byte_multiple_extensions_with_padding()
314         .get_extension(3)  in test_rfc_8285_one_byte_multiple_extensions_with_padding()
473     let ext = p.header.get_extension(1);  in test_rfc8285_two_byte_multiple_extension_with_padding()
480     let ext = p.header.get_extension(2);  in test_rfc8285_two_byte_multiple_extension_with_padding()
487     let ext = p.header.get_extension(3);  in test_rfc8285_two_byte_multiple_extension_with_padding()
585     let res = p.header.get_extension(1);  in test_rfc8285_get_extension_returns_nil_when_extension_disabled()
619     let ext = p.header.get_extension(1);  in test_rfc8285_del_extension()
624     let ext = p.header.get_extension(1);  in test_rfc8285_del_extension()
677         let ext = p.header.get_extension(id);  in test_rfc8285_get_extension_ids()
762         p.header.get_extension(1),  in test_rfc8285_one_byte_set_extension_should_enable_extension_when_adding()
824         p.header.get_extension(1),  in test_rfc8285_set_extension_should_update_existing_extension()
833         p.header.get_extension(1),  in test_rfc8285_set_extension_should_update_existing_extension()
973         p.header.get_extension(1),  in test_rfc8285_two_bytes_set_extension_should_enable_extension_when_adding()
1005         p.header.get_extension(1),  in test_rfc8285_two_byte_set_extension_should_update_existing_extension()
1017     assert_eq!(p.header.get_extension(1), Some(extension));  in test_rfc8285_two_byte_set_extension_should_update_existing_extension()
1100     let res = p.header.get_extension(0);  in test_rfc3550_set_extension_should_error_when_non_zero()