lodash: signatures of the method _.trimLeft changed

lodash/lodash-tests.ts

@@ -3639,11 +3639,25 @@ result = <string>_('-_-abc-_-').trim();
 result = <string>_('-_-abc-_-').trim('_-');
 
 // _.trimLeft
-result = <string>_.trimLeft();
-result = <string>_.trimLeft('  abc  ');
-result = <string>_.trimLeft('-_-abc-_-', '_-');
-result = <string>_('-_-abc-_-').trimLeft();
-result = <string>_('-_-abc-_-').trimLeft('_-');
+module TestTrimLeft {
+    {
+        let result: string;
+
+        result = _.trimLeft();
+        result = _.trimLeft('  abc  ');
+        result = _.trimLeft('-_-abc-_-', '_-');
+
+        result = _('-_-abc-_-').trimLeft();
+        result = _('-_-abc-_-').trimLeft('_-');
+    }
+
+    {
+        let result: _.LoDashExplicitWrapper<string>;
+
+        result = _('-_-abc-_-').chain().trimLeft();
+        result = _('-_-abc-_-').chain().trimLeft('_-');
+    }
+}
 
 // _.trimRight
 result = <string>_.trimRight();

lodash/lodash.d.ts

@@ -9296,11 +9296,15 @@ declare module _ {
     interface LoDashStatic {
         /**
          * Removes leading whitespace or specified characters from string.
+         *
          * @param string The string to trim.
          * @param chars The characters to trim.
          * @return Returns the trimmed string.
          */
-        trimLeft(string?: string, chars?: string): string;
+        trimLeft(
+            string?: string,
+            chars?: string
+        ): string;
     }
 
     interface LoDashImplicitWrapper<T> {
@@ -9310,6 +9314,13 @@ declare module _ {
         trimLeft(chars?: string): string;
     }
 
+    interface LoDashExplicitWrapper<T> {
+        /**
+         * @see _.trimLeft
+         */
+        trimLeft(chars?: string): LoDashExplicitWrapper<string>;
+    }
+
     //_.trimRight
     interface LoDashStatic {
         /**