type BlockProxyConstructor: typeof BlockProxy & object;
The base BlockProxy class provides no special functionality for any specific type of block.
To provide direct type-safe support for specific block types, extend BlockProxy and add a
classNameRegex, then include your new block proxy in the allProxyClasses list. Then, whenever
we construct a proxy to represent a block on the document, we will check each available
proxy class and use one of these if available.
Type declaration
classNameRegex
classNameRegex: RegExp;