This property defines the Unicodes which belongs to Thai block
Characters like ก,ข,ฃ, etc. are listed under Thai Block.
90 Characters are present in Thai Block starting with the Unicode point U+0E01 that represents the character ก.
Currently, as per latest version 15.0.0, Unicode supports 328 number of Block. Here are a few examples - Latin Extended E,Adlam,Aegean Numbers, etc.