public PatternGuardExpr(String namespace,String name,Expression[] parameters,PatternExpr guarded){
  this(namespace,name,Arrays.asList(parameters),guarded);
}

public PatternGuardExpr ( String namespace , String name , Expression [ ] parameters , PatternExpr guarded ) { this ( namespace , name , Arrays . asList ( parameters ) , guarded ) ; }
ctor - for use to create a pattern expression tree , without pattern child expression .
