code: private static final boolean isgraphPOSIX(int c) {
          /* \p{space}\p{gc=Control} == \p{gc=Z}\p{Control} */
          /* comparing ==0 returns FALSE for the categories mentioned */
          return (getMask(UCharacter.getType(c))&
                  (GC_CC_MASK|GC_CS_MASK|GC_CN_MASK|GC_Z_MASK))
                 ==0;
      }
docs: Checks if c is in
  [^\p{space}\p{gc=Control}\p{gc=Surrogate}\p{gc=Unassigned}]
  with space=\p{Whitespace} and Control=Cc.
  Implements UCHAR_POSIX_GRAPH.
  @hide draft / provisional / internal are hidden on Android