diff --git a/src/Widget.ts b/src/Widget.ts
index 3ba5c3f..1fb425d 100644
--- a/src/Widget.ts
+++ b/src/Widget.ts
@@ -104,6 +104,15 @@ abstract class Widget {
     this._parsedWidgetProps = value;
   }
 
+  _isFunction: boolean | undefined;
+  get isFunction(): boolean | undefined {
+    return this._isFunction;
+  }
+
+  set isFunction(value: boolean | undefined) {
+    this._isFunction = value;
+  }
+
   constructor(props?: any) {
     this._colspan = Widget._defaultColspan;
     this._invisible = false;
@@ -161,6 +170,9 @@ abstract class Widget {
       if (props.key) {
         this._key = props.key;
       }
+      if (props.is_function) {
+        this._isFunction = props.is_function;
+      }
     }
   }
 
diff --git a/src/spec/Tree.spec.ts b/src/spec/Tree.spec.ts
index 9bf0183..c51e1e2 100644
--- a/src/spec/Tree.spec.ts
+++ b/src/spec/Tree.spec.ts
@@ -358,4 +358,23 @@ describe("A Tree", () => {
     expect(tree.contextForFields.lang).toBeDefined();
     expect(tree.contextForFields.lang).toEqual({ active_test: false });
   });
+  it("Column isFunction property should be informed", () => {
+    const tree = new Tree({
+      name: {
+        required: true,
+        select: true,
+        size: 128,
+        string: "Potència contractada (kW)",
+        type: "char",
+        is_function: true,
+        views: {},
+      },
+    });
+    tree.parse(
+      `<tree string="Partners" colors="red:type=='updated'"><field name="name" sum="Pot&#232;ncia contractada (kW)" /></tree>`,
+    );
+
+    const nameWidget = tree.findById("name") as Char;
+    expect(nameWidget.isFunction).toBeTruthy();
+  });
 });