There are three classes of data accessors: readers, selectors and writers.

• Readers implement \Remorhaz\JSON\Data\ReaderInterface that provides basic read-only access to associated data: type checks, export, etc.
• Selectors extend readers and implement \Remorhaz\JSON\Data\SelectorInterface that allows to switch data by moving internal cursor step by step deeper into JSON structures.
• Writers extend selectors and implement \Remorhaz\JSON\Data\WriterInterface that allows modification of currently selected data.

You can use Reference/Reader, Reference/Selector and Reference/Writer classes that work with native PHP structures by reference or implement your own accessors.

1. Due to the restriction of PHP objects in versions before 7.1, it is impossible to access "" (empty string) property by reference, so it is disabled in Reference/* accessors.