return the value of an iterator

returns the explanatory string

! @return false if the object is successfully converted to a bjdata ndarray, true if the type or size is invalid */

! @brief Writes a BSON element with key @a name and array @a value */

! @brief Writes a BSON element with key @a name and binary value @a value */

! @brief Writes a BSON element with key @a name and boolean value @a value */

! @brief Writes a BSON element with key @a name and double value @a value */

! @brief Serializes the JSON value @a j to BSON and associates it with the key @a name. @param name The name to associate with the

! @brief Writes the given @a element_type and @a name to the output adapter */

! @brief Writes a BSON element with key @a name and integer @a value */

! @brief Writes a BSON element with key @a name and null value */

! @param[in] value JSON value to serialize @pre value.type() == value_t::object */

! @brief Writes a BSON element with key @a name and object @a value */

! @brief Writes a BSON element with key @a name and string value @a value */

! @brief Writes a BSON element with key @a name and unsigned @a value */

@brief destructor @sa https://json.nlohmann.me/api/basic_json/~basic_json/

NOLINT(hicpp-noexcept-move,performance-noexcept-move-constructor)

NOLINT(hicpp-noexcept-move,performance-noexcept-move-constructor,cppcoreguidelines-noexcept-move-operations)

NOLINT(hicpp-noexcept-move,performance-noexcept-move-constructor)

NOLINT(hicpp-noexcept-move,performance-noexcept-move-constructor)

NOLINT(hicpp-noexcept-move,performance-noexcept-move-constructor)