ctxField
	ctxParam
	ctxAssign2 // assignment of a single expression to two variables
	ctxSwitch
	ctxTypeSwitch
	ctxFile
	ctxDecl
	ctxSpec
	ctxDefer
	ctxCall  // any function call other than ctxCall2
	ctxCall2 // function call whose result is assigned to two variables
	ctxSelector
)

// walk walks the AST x, calling visit(f, x, context) for each node.

import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
import java.util.Map;
import java.util.function.Function;

import org.codelibs.fess.es.log.allcommon.EsAbstractEntity.DocMeta;
import org.codelibs.fess.es.log.allcommon.EsAbstractEntity.RequestOptionCall;
import org.dbflute.Entity;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
import java.util.Map;
import java.util.function.Function;

import org.codelibs.fess.es.config.allcommon.EsAbstractEntity.DocMeta;
import org.codelibs.fess.es.config.allcommon.EsAbstractEntity.RequestOptionCall;
import org.dbflute.Entity;

    }

    private static Function<String, String> prefix(String prefix, Function<String, String> cb) {
        return s -> {
            String v = null;
            if (s.startsWith(prefix)) {
                v = cb.apply(s.substring(prefix.length()));
            }
            return v;
        };
    }

    private static Function<String, String> or(Function<String, String>... callbacks) {

  empty-args: 2
  empty-line-between-blocks: 2
  extends-before-declarations: 2
  extends-before-mixins: 2
  final-newline: 2
  force-attribute-nesting: 0
  force-element-nesting: 0
  force-pseudo-nesting: 0
  function-name-format: 2
  hex-length: 0
  hex-notation: 2
  id-name-format: 2
  indentation:
    - 2
    -
      size: 4
  leading-zero:
    - 2
    -
      include: false
  max-file-line-count: 0

import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.Iterator;
import java.util.List;
import java.util.function.Function;
import java.util.function.ToIntFunction;
import java.util.stream.Collector;
import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.Nullable;

/**

Using the, you can replace existing GSS/CSE JavaScript codes with:

```
<script>
  (function() {
    var fess = document.createElement('script');
    fess.type = 'text/javascript';
    fess.async = true;
    fess.src = '//<Fess Server Name>/js/ss/fess-ss.min.js';
    fess.charset = 'utf-8';

type User struct {
	Name    string `json:"username"`
	ID      string `json:"id"`
	Enabled bool   `json:"enabled"`
}

// Standard errors.
var (
	ErrNotImplemented     = errors.New("function not implemented")
	ErrAccessTokenExpired = errors.New("access_token expired or unauthorized")
)

// Provider implements identity provider specific admin operations, such as

import static org.codelibs.core.stream.StreamUtil.stream;

import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.function.BiPredicate;
import java.util.function.Predicate;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.core.lang.StringUtil;
import org.codelibs.core.misc.Tuple3;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
import java.util.Map;
import java.util.function.Function;

import org.codelibs.fess.es.user.allcommon.EsAbstractEntity.DocMeta;
import org.codelibs.fess.es.user.allcommon.EsAbstractEntity.RequestOptionCall;
import org.dbflute.Entity;