@@ -13,8 +13,6 @@ export module knownCollections {
     export const spans = "spans";
 }
 
-const CHILD_SPAN = "Span";
-
 export class FormattedString extends ViewBase implements FormattedStringDefinition, AddArrayFromBuilder, AddChildFromBuilder {
     private _spans: ObservableArray<Span>;
 
@@ -95,7 +93,7 @@ export class FormattedString extends ViewBase implements FormattedStringDefiniti
     }
 
     public _addChildFromBuilder(name: string, value: any): void {
-        if (name === CHILD_SPAN) {
+        if (value instanceof Span) {
             this.spans.push(value);
         }
     }
@@ -109,7 +107,7 @@ export class FormattedString extends ViewBase implements FormattedStringDefiniti
                 this._addView(span);
 
                 // Then attach handlers - we skip the first nofitication because
-                // we raise change for the whole instance. 
+                // we raise change for the whole instance.
                 this.addPropertyChangeHandler(span);
             }
         }
Original file line number	Diff line number	Diff line change
`@@ -13,8 +13,6 @@ export module knownCollections {`
`13`	`13`	`export const spans = "spans";`
`14`	`14`	`}`
`15`	`15`
`16`		`-const CHILD_SPAN = "Span";`
`17`		`-`
`18`	`16`	`export class FormattedString extends ViewBase implements FormattedStringDefinition, AddArrayFromBuilder, AddChildFromBuilder {`
`19`	`17`	`private _spans: ObservableArray<Span>;`
`20`	`18`
`@@ -95,7 +93,7 @@ export class FormattedString extends ViewBase implements FormattedStringDefiniti`
`95`	`93`	`}`
`96`	`94`
`97`	`95`	`public _addChildFromBuilder(name: string, value: any): void {`
`98`		`- if (name === CHILD_SPAN) {`
	`96`	`+ if (value instanceof Span) {`
`99`	`97`	`this.spans.push(value);`
`100`	`98`	`}`
`101`	`99`	`}`
`@@ -109,7 +107,7 @@ export class FormattedString extends ViewBase implements FormattedStringDefiniti`
`109`	`107`	`this._addView(span);`
`110`	`108`
`111`	`109`	`// Then attach handlers - we skip the first nofitication because`
`112`		`- // we raise change for the whole instance.`
	`110`	`+ // we raise change for the whole instance.`
`113`	`111`	`this.addPropertyChangeHandler(span);`
`114`	`112`	`}`
`115`	`113`	`}`