Q:

package does not exist in compile

My project was working fine. ut suddenly i started to get errors. enter image description here
Meanwhile i can see the package.
enter image description here
I think it may to do with "gradle". I started to use it recently and don't understand this technology well. My build.gradle
    group 'www.www'
version '1.0-SNAPSHOT'

apply plugin: 'java'

sourceCompatibility = 1.8

repositories {
    mavenCentral()
    maven { url "https://jitpack.io" }
}

dependencies {
    testCompile group: 'junit', name: 'junit', version: '4.12'
    compile 'com.github.badoualy:kotlogram:1.0.0-RC3'
    compile 'commons-io:commons-io:2.5'
}

thanks a lot

A:

I changed import and now all fine.
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

