# builtin reading/writing
JSON3.read(json_string)
JSON3.write(x)
# custom types
JSON3.read(json_string, T; kw...)
JSON3.write(x)

# custom types: incrementally update a mutable struct
x = T()
JSON3.read!(json_string, x; kw...)
JSON3.write(x)
# read from file
json_string = read("my.json", String)
JSON3.read(json_string)
JSON3.read(json_string, T; kw...)
# write to file
open("my.json", "w") do f
    JSON3.write(f, x)
    println(f)
end
# write a pretty file
open("my.json", "w") do f
    JSON3.pretty(f, JSON3.write(x))
    println(f)
end
# generate a type from json
using StructTypes
JSON3.@generatetypes json_string_sample
JSON3.read(json_string, JSONTypes.Root)