1. A method of representing a structure for a message for a software object corresponding to an application program interface (API) within a graphical user interface, the method comprising: retrieving a code for the message structure of the API, where the code includes nodes with node names and delimiters, where the delimiters indicate a hierarchical structure for the nodes; determining a hierarchical structure of the code of the message structure for the API; and displaying the message structure of the API in a pane of the graphical user interface in a hierarchical according to the hierarchical structure of the message.