Documentation for MPS graph has no information

Documentation for MPS graph has no information about class and methods functionality. Its only enumerates everything it's got without any explanation what it is and how it works. Why so?

https://developer.apple.com/documentation/metalperformanceshadersgraph

Though, In MPSGraph header files there is some commentaries, so it's seems like a bug

Documentation for MPS graph has no information
 
 
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