Provide a read/write API's for a) Power BI reports & elements b) Data Model

it would be very useful to have API's so one could programmatically examine, build, or modify both DAX models & measures, as well as UI elements/visuals. This would be comparable to "reflection" style coding one would do in environments like C# or MS Access, where one might write code to loop through all the properties in all your classes looking for something, or looping through all the properties in all the controls in all your forms. These API's obviously exist, as that's what Power BI desktop UI interacts with when the user is building out a model and visuals, I would like to access those same models programmatically.