Return a reference providing non-modifiable access to the element at the specified index in the JsonArray held by this object. The behavior is undefined unless isArray() returns true and index < theArray().size().
index
JsonArray
isArray()
index < theArray().size()
Declared in <bdljsn_json.h>
<bdljsn_json.h>
Json const& operator[](std::size_t index) const;