This property defines the Unicodes indicates that a Zero Width Joiner character is part of the cluster boundary
Characters like , etc. are listed under Zero Width Joiner Grapheme Cluster Break.
1 Characters are present in Zero Width Joiner Grapheme Cluster Break starting with the Unicode point U+200D that represents the character .
Currently, as per latest version 15.0.0, Unicode supports 14 number of Grapheme Cluster Break. Here are a few examples - Base,Carriage Return,Control Neutral, etc.