No Exception Is Thrown for Invalid Index Name

[gordonbanderson]

Detailed description

This should throw an exception if the index name does not exist. Currently it simply returns an empty array

$this->indexes = new Indexes();
$this->indexes->getFacetFields('INVALID_INDEX_NAME');

Context

An invalid index name should trigger an exception when accessing properties. A blank array is a silent fail.

Possible implementation

Not obligatory, but suggest an idea for implementing addition or change.

Your environment

Testing using Docker and php-cli container