PHP thumbnail size ignored due to incorrect mapping

The thumbnail size parameter is incorrect...

'[filters]' should be removed from the thumbnail_size line in order to return the correct sized thumbnail.

https://github.com/adobe/stock-api-sdk/blob/master/stock-api-libphp/src/Models/SearchParameters.php

`'filters_thumbnail_size' => '[filters][thumbnail_size]',`

Also, the size definitions appear different to that of the documentation.

https://github.com/adobe/stock-api-sdk/blob/master/stock-api-libphp/src/Core/Constants.php
Original...
`$_searchParamsThumbSizes = [
'MEDIUM' => 110,
'BIG' => 160,
'XL' => 500,
'XXL' => 1000,
];`

As per docs...
`$_searchParamsThumbSizes = [
'SMALL' => 110,
'MEDIUM' => 160,
'LARGE' => 240,
'XL' => 500,
'XXL' => 1000,
];`

The watermark appears on each image at 240px, how can we remove the thumbnail watermark as per the documentation?

Start with stock-api-libphp/src/Models/SearchParameters.php and stock-api-libphp/src/Core/Constants.php, then compare their thumbnail parameter mapping and size definitions with the linked Adobe Stock documentation. Done means the requested thumbnail sizes and parameter mapping match the documentation; the watermark question remains to be verified against the documented API behavior.

Written by the indexing model from the issue text.