33             "bool" => Some(Bool),  in from_str()
34             "c_char" => Some(Char),  in from_str()
35             "u8" => Some(U8),  in from_str()
36             "u16" => Some(U16),  in from_str()
37             "u32" => Some(U32),  in from_str()
38             "u64" => Some(U64),  in from_str()
39             "usize" => Some(Usize),  in from_str()
40             "i8" => Some(I8),  in from_str()
41             "i16" => Some(I16),  in from_str()
42             "i32" => Some(I32),  in from_str()
43             "i64" => Some(I64),  in from_str()
44             "isize" => Some(Isize),  in from_str()
45             "f32" => Some(F32),  in from_str()
46             "f64" => Some(F64),  in from_str()
47             "CxxString" => Some(CxxString),  in from_str()
48             "String" => Some(RustString),  in from_str()