Is there a unified API for loading/saving JSON, YAML, and TOML files?

I wonder if there exists a unified API for reading/writing JSON, YAML, and TOML files. Currently, I am doing it by myself. I am treating them as configuration files to store my calculations settings. But it would be nice to have a unified load or save function, like what we have in FileIO.jl. Why don’t we have that in FileIO.jl?