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override fun isCallGraphRequired(): Boolean {
    return true
}

// Another call graph example: https://groups.google.com/forum/#!searchin/lint-dev/caller|sort:date/lint-dev/wFvCZOt4wZ8/g5punP99BAAJ
override fun analyzeCallGraph(context: Context, callGraph: CallGraphResult) {
    val contextualCallGraph = callGraph.callGraph.buildContextualCallGraph(callGraph.receiverEval)
    val okHttpClientNodes = contextualCallGraph.contextualNodes.stream().filter { contextualNode ->
        val element = contextualNode.node.target.element
        if(element is UMethod) {

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@Test
fun `test multiple calls to method which created OkHttpClient`() {
    val kotlinFile = kotlin(
        """
        package com.brokoli.lint

        import okhttp3.OkHttpClient

        class MyClass {

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private const val OKHTTP_CLIENT = "okhttp3.OkHttpClient"

private val okHttpClientConstructors = mutableSetOf<CallContextLocation>()

data class CallContextLocation(val context: JavaContext, val location: Location)

override fun getApplicableUastTypes(): List<Class<out UElement>>? {
    return listOf(UCallExpression::class.java)
}

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@Test
fun `two calls to OkHttpClient constructor in different files`() {
    val javaFile = java(
        """
        package com.brokoli.lint;

        import okhttp3.OkHttpClient;
        class MyClass {

            public void method1() {

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class MoreThanOneOkHttpClientDetectorTest : AndroidSdkLintDetectorTest() {

  override fun getDetector(): Detector = MoreThanOneOkHttpClientDetector()

  override fun getIssues(): MutableList<Issue> = mutableListOf(MoreThanOneOkHttpClientDetector.ISSUE)

  private val okHttpClientFile = java(
      """
          package okhttp3;
          class OkHttpClient {

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class MoreThanOneOkHttpClientDetector : Detector(), SourceCodeScanner {
  
  private fun reportUsage(context: JavaContext, location: Location) {
      context.report(
          issue = ISSUE,
          location = location,
          message = "You should only create one OkHttpClient instance"
      )
  }

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UFile (package = com.brokoli.lint)
    UClass (name = MyClass)
        UAnnotationMethod (name = methodWith6Parameters)
            UParameter (name = first)
                UAnnotation (fqName = org.jetbrains.annotations.NotNull)
            UParameter (name = second)
                UAnnotation (fqName = org.jetbrains.annotations.NotNull)
            UParameter (name = third)
                UAnnotation (fqName = org.jetbrains.annotations.NotNull)
            UParameter (name = fourth)

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override fun getApplicableUastTypes(): List<Class<out UElement>>? {
    return listOf(UMethod::class.java)
}

override fun createUastHandler(context: JavaContext): UElementHandler? {
    return MethodHandler(context)
}

inner class MethodHandler(private val context: JavaContext) : UElementHandler() {
  

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@Test
fun `kotlin method with 6 parameters`() {
    val kotlinFile = kotlin(
        """
        package com.brokoli.lint;

        class MyClass {

            fun methodWith6Parameters(first: Boolean, second: String, third: Int, fourth: Long, fifth: Char, sixth: Boolean) {

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override fun getDetector(): Detector = TooManyParametersDetector()

override fun getIssues(): MutableList<Issue> = mutableListOf(TooManyParametersDetector.ISSUE)

@Test
fun `java method with 0 parameters`() {
    val javaFile = java(
        """
        package com.brokoli.lint;