Getting "Element 'binding.rest' not expected" in BPEL

I created a BPEL process and attempted to add the property oracle.webservices.http.headers to my reference as shown below.

However, during compilation, I received the following error:

Error(39,100): schema - (Error) Element 'binding.rest' not expected.

Solution

Move the <binding.rest> line above the <property> line.