v6.19.4
* Add `ElementProxy::memoryUsage()` * Add `MemberProxy::memoryUsage()` (issue #1730) * Add implicit conversion from `JsonDocument` to `JsonVariant` * Fix comparisons operators with `const JsonDocument&`
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* Add `ElementProxy::memoryUsage()` * Add `MemberProxy::memoryUsage()` (issue #1730) * Add implicit conversion from `JsonDocument` to `JsonVariant` * Fix comparisons operators with `const JsonDocument&`