/*
 * Copyright 2015-present Facebook, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License. You may obtain
 * a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */

package com.facebook.buck.cxx.toolchain;

import com.facebook.buck.core.model.BuildTarget;
import com.facebook.buck.core.rules.SourcePathRuleFinder;
import com.facebook.buck.core.sourcepath.PathSourcePath;
import com.facebook.buck.core.sourcepath.SourcePath;
import com.facebook.buck.io.filesystem.ProjectFilesystem;
import com.facebook.buck.rules.SymlinkTree;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableMultimap;
import java.nio.file.Path;
import java.util.Optional;

public class HeaderSymlinkTree extends SymlinkTree {

  public HeaderSymlinkTree(
      BuildTarget target,
      ProjectFilesystem filesystem,
      Path root,
      ImmutableMap<Path, SourcePath> links,
      SourcePathRuleFinder ruleFinder) {
    super("cxx_header", target, filesystem, root, links, ImmutableMultimap.of(), ruleFinder);
  }

  /**
   * Get path to use as an include path to get access to the files in the tree.
   *
   * <p>If {@link #getHeaderMap()} is present, then the path it returns needs to be passed as an
   * include path as well and it has to be passed before the path returned from this method.
   *
   * <p>This path should not be added to rulekeys as a SourcePath (in some cases it points to the
   * entire buck-out).
   */
  public PathSourcePath getIncludeSourcePath() {
    return PathSourcePath.of(getProjectFilesystem(), getProjectFilesystem().relativize(getRoot()));
  }

  /** Get path of the header map indexing this tree if one exists. */
  public Optional<Path> getHeaderMap() {
    return Optional.empty();
  }

  public Optional<SourcePath> getHeaderMapSourcePath() {
    return Optional.empty();
  }
}

@@ -1582,16 +1582,26 @@
 eaderMap
+SourcePath
 ()%7D is p
@@ -1655,19 +1655,19 @@
 ssed
+%0A   *
  as an
-%0A   *
  inc
@@ -2041,153 +2041,8 @@
  %7D%0A%0A
-  /** Get path of the header map indexing this tree if one exists. */%0A  public Optional%3CPath%3E getHeaderMap() %7B%0A    return Optional.empty();%0A  %7D%0A%0A
   pu

Remove unused function HeaderSymlinkTree.getHeaderMap