RTEditor/src/main/java/com/onegravity/rteditor/api/RTMediaFactoryImpl.java
@Override
    /* @inheritDoc */
    public RTImage createImage(RTMediaSource mediaSource) {
        File targetFile = loadMedia(mediaSource);
        return targetFile == null ? null :
                new RTImageImpl(targetFile.getAbsolutePath());
    }
@Override
    /* @inheritDoc */
    public RTImage createImage(RTMediaSource mediaSource) {
        File targetFile = loadMedia(mediaSource);
        return targetFile == null ? null :
                new RTImageImpl(targetFile.getAbsolutePath());
    }
/*
Use case 1: Inserting media objects into the rich text editor.

This default implementation copies all files into the dedicated media
storage area.