diff --git a/gradle/jsonModelsGeneration.gradle b/gradle/jsonModelsGeneration.gradle
index bac0bcf..e808218 100644
--- a/gradle/jsonModelsGeneration.gradle
+++ b/gradle/jsonModelsGeneration.gradle
@@ -30,7 +30,6 @@ buildscript {
 }
 
 import com.squareup.javapoet.*
-import javafx.util.Pair
 import org.yaml.snakeyaml.Yaml
 
 import javax.lang.model.element.Modifier
@@ -62,6 +61,18 @@ class Types {
 
 }
 
+class Pair<TKey, TValue> {
+
+    public final TKey key;
+    public final TValue value;
+
+    public Pair(final TKey key, final TValue value) {
+        this.key = key
+        this.value = value
+    }
+
+}
+
 /**
  * Abstract object of scheme for generation. Includes:
  * - models of objects (classes);
@@ -429,7 +440,7 @@ class TypeNameUtils {
             if (!result.key.isEmpty()) {
                 throw new Exception("Useless symbols '" + result.key + "'")
             }
-            return result.getValue()
+            return result.value
         } catch (final Exception exception) {
             throw new Exception("Error resolving type of '" + typeString + "' : " + exception.getMessage())
         }