Let didChangeConfiguration decide what options are interesting for the indexer

src/Options.php

@@ -11,11 +11,6 @@ class Options
      */
     public $fileTypes = ['.php'];
 
-    /**
-     * List of options that affect the indexer
-     */
-    private $indexerOptions = ['fileTypes'];
-
     /**
      * Validate/Filter input and set options for file types
      *
@@ -31,16 +26,6 @@ class Options
         $this->fileTypes = !empty($fileTypes) ? $fileTypes : $this->fileTypes;
     }
 
-    /**
-     * Get list with options that affect the indexer
-     *
-     * @return array
-     */
-    public function getIndexerOptions(): array
-    {
-        return $this->indexerOptions;
-    }
-
     /**
      * Filter valid file type
      *

src/Server/Workspace.php

@@ -229,6 +229,9 @@ class Workspace
      */
     public function didChangeConfiguration($settings = null): bool
     {
+        // List of options that affect the indexer
+        $indexerOptions = ['fileTypes'];
+
         if ($settings === null) {
             return false;
         }
@@ -253,7 +256,7 @@ class Workspace
             $this->options->$prop = $val;
         }
 
-        if ($this->indexer && !empty(array_intersect($changedOptions, $this->options->getIndexerOptions()))) {
+        if ($this->indexer && !empty(array_intersect($changedOptions, $indexerOptions))) {
             // check list of options that changed since last time against the list of valid indexer options
 
             // wipe main index and start reindexing