Function from_reader 

pub fn from_reader<R, T>(rdr: R) -> Result<T>
where
    R: Read,
    T: DeserializeOwned,

Deserialize an instance of type T from an I/O stream of JSON.

Equivalent to serde_json::from_reader but with errors extended with serde_path_to_error.

See serde_json::from_reader for more documentation.