Two helper methods

These two helper methods are in some other open source libraries but we don't always include those. It bugged me enough that I added them here.

Signed-off-by: Aaron Rosenzweig <[email protected]>

Frameworks/Core/ERExtensions/Sources/er/extensions/foundation/ERXStringUtilities.java

@@ -2789,4 +2789,15 @@ public static String cleanString(String newString, NSArray<String> toBeCleaneds)
         return result;
     }
 
+	public static boolean isBlank(String value) {
+		boolean isBlank = false;
+		if (value == null || value.trim().length() == 0) {
+			isBlank = true;
+		}
+		return isBlank;
+	}
+
+	public static boolean isNotBlank(String value) {
+		return ! isBlank(value);
+	}
 }