Use function getConcordanceTarget() over direct array access

src/MDConcMarkingPosition.php

@@ -9,9 +9,9 @@ declare(strict_types = 1);
 /**
  * Provides lists for categorizing spelled out marking positions.
  */
-final class MDConcMarkingPosition {
+final class MDConcMarkingPosition implements MDImporterConcordanceListInterface {
 
-    const MARKING_POSITIONS_VERBOSE = [
+    private const MARKING_POSITIONS_VERBOSE = [
 
         // Center
         "mittig" => "center",
@@ -294,4 +294,20 @@ final class MDConcMarkingPosition {
         "oberer Holzkasten" => "other",
     ];
 
+    /**
+     * Require a function for getting the concordance target.
+     *
+     * @param string $input Input string.
+     *
+     * @return string
+     */
+    public static function getConcordanceTarget(string $input):string {
+
+        if (!isset(self::MARKING_POSITIONS_VERBOSE[$input])) {
+            throw new MDImporterMissingConcordance("Unknown marking position: " . $input);
+        }
+
+        return self::MARKING_POSITIONS_VERBOSE[$input];
+
+    }
 }