comefrom: <awangdev>20. Valid Parentheses_1.java
code: private boolean validate(char a, char b) {
  
          if (a == '(') return b == ')';
          if (a == '{') return b == '}';
          if (a == '[') return b == ']';
          return false;
      }
masked: private boolean var_0 ( char var_1 , char var_2 ) {
    if ( var_1 == '(' ) return var_2 == ')' ;
    if ( var_1 == '{' ) return var_2 == '}' ;
    if ( var_1 == '[' ) return var_2 == ']' ;
    return false ;
  }
  