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title: Incompatible Changes in IntelliJ Platform and Plugins API
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<class name>.<method name> method removed
<class name>.<field name> field removed
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## Changes in IntelliJ Platform 2017.3

|  Change | How to deal with it |
|---------|---------------------|
| `com.intellij.internal.statistic.AbstractApplicationUsagesCollector` class removed | This class isn't supposed to be used in regular plugins. Override `com.intellij.internal.statistic.AbstractProjectsUsagesCollector` instead if you're developing an IDE with its own statistics services. |
| `com.intellij.internal.statistic.UsagesCollector.doPersistProjectUsages` method removed | This method isn't supposed to be used in regular plugins. There is no need to call this method anymore. |
|`org.apache.sanselan` package removed | Use classes from `org.apache.commons.imaging` instead |

## Changes in PhpStorm and PHP plugin 2017.3

|  Change | How to deal with it |
|---------|---------------------|
| `com.jetbrains.php.lang.psi.elements.Function.getReturnType()` now returns `PhpReturnType` instead of `PsiElement` | Before method had been returning a `com.jetbrains.php.lang.psi.elements.ClassReference`. Now method returns `com.jetbrains.php.lang.psi.elements.PhpReturnType`. Method `ReturnType.getClassReference()` can be used if you need just a `ClassReference`. If you need to get the `PhpType`, use `com.jetbrains.php.lang.psi.elements.Function.getReturnType.getType()` method instead |

## Changes in IntelliJ Platform 2016.3

|  Change | How to deal with it |
|---------|---------------------|
| [`ApplicationListener.afterWriteActionFinished`](upsource:///platform/core-api/src/com/intellij/openapi/application/ApplicationListener.java?nav=1481:1505:focused&line=45) abstract method added | Implement this method or extend [`com.intellij.openapi.application.ApplicationAdapter`](upsource:////platform/core-api/src/com/intellij/openapi/application/ApplicationAdapter.java) class instead of implementing the interface |


## Changes in IntelliJ Platform 2016.2 

|  Change | How to deal with it |
|---------|---------------------|
| `com.intellij.util.net.HttpConfigurable.PROXY_LOGIN` field removed | Use [`com.intellij.util.net.HttpConfigurable.getProxyLogin()`](upsource:///platform/platform-api/src/com/intellij/util/net/HttpConfigurable.java) instead |
| `com.intellij.util.net.HttpConfigurable.PROXY_PASSWORD_CRYPT` field removed | Use [`com.intellij.util.net.HttpConfigurable.getPlainProxyPassword()`](upsource:///platform/platform-api/src/com/intellij/util/net/HttpConfigurable.java) instead |
| `org.jetbrains.asm4` package removed | Use classes from `org.jetbrains.org.objectweb.asm` package instead |