error after importing Parse UI widget

[nirupbbnk]

**_

Error:(29, 0) Cannot get property 'parse' on extra properties extension as it does not exist
And the error points to this line in dependency
dependencies {
compile rootProject.ext.parse
_**

import com.android.builder.core.BuilderConstants

apply plugin: 'com.android.library'

version = "0.0.1"
group = 'com.parse'

dependencies {
compile rootProject.ext.parse

androidTestCompile 'com.crittercism.dexmaker:dexmaker:1.4'
androidTestCompile 'com.crittercism.dexmaker:dexmaker-mockito:1.4'
androidTestCompile 'com.crittercism.dexmaker:dexmaker-dx:1.4'
androidTestCompile 'org.mockito:mockito-core:1.10.19'
androidTestCompile ('org.skyscreamer:jsonassert:1.2.3') {
    exclude module: 'json'
}

}

android {
compileSdkVersion rootProject.ext.compileSdkVersion
buildToolsVersion rootProject.ext.buildToolsVersion

defaultConfig {
    minSdkVersion rootProject.ext.minSdkVersion
    targetSdkVersion rootProject.ext.targetSdkVersion
    versionName project.version
    versionCode 1
}

}

android.libraryVariants.all { variant ->
def name = variant.buildType.name

def javadocTask = task("javadoc${variant.name.capitalize()}", type: Javadoc) {
    description "Generates Javadoc for $variant.name."
    source = variant.javaCompile.source
    ext.androidJar = "${android.sdkDirectory}/platforms/${android.compileSdkVersion}/android.jar"
    classpath = files(variant.javaCompile.classpath.files) + files(ext.androidJar)

    options.linksOffline("http://d.android.com/reference", "${android.sdkDirectory}/docs/reference")
    options.links("http://boltsframework.github.io/docs/android/")

    exclude '**/BuildConfig.java'
    exclude '**/R.java'
    exclude '**/internal/**'
    exclude '**/oauth/**'
}

def javadocJarTask = task("javadocJar${variant.name.capitalize()}", type: Jar, dependsOn: "javadoc${variant.name.capitalize()}") {
    classifier = 'javadoc'
    from javadocTask.destinationDir
}

if (name.equals(BuilderConstants.RELEASE)) {
    artifacts.add('archives', javadocJarTask);
}

}

//region Maven

apply plugin: 'maven'
apply plugin: 'signing'

def isSnapshot = version.endsWith('-SNAPSHOT')
def ossrhUsername = hasProperty('NEXUS_USERNAME') ? NEXUS_USERNAME : System.getenv('CI_NEXUS_USERNAME')
def ossrhPassword = hasProperty('NEXUS_PASSWORD') ? NEXUS_PASSWORD : System.getenv('CI_NEXUS_PASSWORD')

uploadArchives {
repositories.mavenDeployer {
beforeDeployment { MavenDeployment deployment -> signing.signPom(deployment) }

    repository(url: "https://oss.sonatype.org/service/local/staging/deploy/maven2/") {
        authentication(userName: ossrhUsername, password: ossrhPassword)
    }

    snapshotRepository(url: "https://oss.sonatype.org/content/repositories/snapshots/") {
        authentication(userName: ossrhUsername, password: ossrhPassword)
    }

    pom.project {
        name 'ParseUI-Widget-Android'
        artifactId = 'parseui-widget-android'
        packaging 'aar'
        description 'A library contains ui widgets for building apps with the Parse Android SDK.'
        url 'https://github.com/ParsePlatform/ParseUI-Android'

        scm {
            connection 'scm:git@github.com:ParsePlatform/ParseUI-Android.git'
            developerConnection 'scm:git@github.com:ParsePlatform/ParseUI-Android.git'
            url 'https://github.com/ParsePlatform/ParseUI-Android'
        }

        licenses {
            license {
                name 'Platform License'
                url 'https://github.com/ParsePlatform/ParseUI-Android/blob/master/LICENSE'
                distribution 'repo'
            }
        }

        developers {
            developer {
                id 'parse'
                name 'Parse'
            }
        }
    }
}

}

signing {
required { !isSnapshot && gradle.taskGraph.hasTask("uploadArchives") }
sign configurations.archives
}

task androidSourcesJar(type: Jar) {
classifier = 'sources'
from android.sourceSets.main.java.sourceFiles
}

artifacts {
archives androidSourcesJar
}

//endregion
`