Regex to match identifiers parts
Type: string
protected $idPartRegex = "/[\\p{Lu}\\p{Ll}\\p{Lt}\\p{Lm}\\p{Lo}\\p{Nl}\\x{1885}\\x{1886}\\x{2118}\\x{212E}\\x{309B}\\x{309C}\\p{Mn}\\p{Mc}\\p{Nd}\\p{Pc}\\x{00B7}\\x{0387}\\x{1369}\\x{136A}\\x{136B}\\x{136C}\\x{136D}\\x{136E}\\x{136F}\\x{1370}\\x{1371}\\x{19DA}\\x{200C}\\x{200D}]/u";