where field value does not contain wildcard

[Anecho]

Hello,

#99 issue is very similar, but was closed with a fix, which actually fixes only #109 , as contains refers to comparison within a string, not a list. It is similar to sql LIKE operator.

So if we have Field1 = APK1234, Field2 = 1234 & Field3 = 5678
$client->where('Field', '!contains', 'APK') or $client->where('Field', 'not like', 'APK') should return only Field2 & Field3
But it does not work, as I am getting 400 Bad Request response: "One or more problems were encountered when parsing the filter: -- line 1 col 29: invalid BoolCompExprTail"

Currently Grammar has these specified as $functions

odata-client-php/src/Query/Grammar.php

Line 22 in 77a80d9

'contains', 'startswith', 'endswith', 'substringof'

I am aware, that OData does not support invert of contains by default, instead $filter=indexof(Field, 'APK') eq -1 provides inverted behavior.

How can we achieve such functionality with your library?