assetsPrefix property
The property assetsPrefix should be the start of your assets folder
by default it to assets and the reason why we need to know it
Because in case when you don't define a value for ImageProviderBuilder
in the QuillEditorImageEmbedConfigurations which exists in
FlutterQuillEmbeds.editorBuilders
then the only way of how to know if this is asset image that you added
in the pubspec.yaml is by asking you the assetsPrefix, how should the
start of your asset images usualy looks like?? in most projects it's
assets so we will go with that as a default
but if you are using different name and you want to use assets images
in the QuillEditor then it's important to override this
if you want a custom solution then please use imageProviderBuilder
Implementation
final String assetsPrefix;