/*
 * Copyright 2000-2009 JetBrains s.r.o.
 *
 * 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.intellij.openapi.roots;

import com.intellij.openapi.project.Project;
import org.jetbrains.annotations.NotNull;

import java.util.EventObject;

/**
 *  @author dsl
 */
public abstract class ModuleRootEvent extends EventObject{

  protected ModuleRootEvent(@NotNull Project project) {
    super(project);
  }

  public abstract boolean isCausedByFileTypesChange();
}

// Copyright 2000-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
package com.intellij.openapi.roots;

import com.intellij.openapi.project.Project;
import org.jetbrains.annotations.NotNull;

import java.util.EventObject;

/**
 *  @author dsl
 */
public abstract class ModuleRootEvent extends EventObject{

  protected ModuleRootEvent(@NotNull Project project) {
    super(project);
  }

  public abstract boolean isCausedByFileTypesChange();

  public Project getProject() {
    return (Project) getSource();
  }
}

Add ModuleRootEvent.getProject()