Values of repositoryType Parameter in VSTS REST API

VSTS REST API is really useful in achieving automations in many aspects of the software development process, and it can be used to write some handy utilities to obtain information quickly with appealing formats. However, sometimes you have to bit struggle to find out which are the correct values to pass for some parameters expected by VSTS REST API, where the documentation does not provide much of a valid information. One such parameter is ‘repositoryType’ in documentation found here for listing build definitions, which does not give any information what are the expected values for the parameter.Documentation here gives some hint on what could be the values but does not have information for REST API expected values.