Skill: API Migration to use com.intellij.util.* classes and methods

You are tasked with optimizing memory usage, consistency, and performance by migrating standard Java/Kotlin classes to IntelliJ's specialized com.intellij.util implementations.

Objective

Go read https://javadoc.jetbrains.net/teamcity/openapi/current/com/intellij/util/package-summary.html, and then optimize memory usage, consistency, and performance by migrating standard Java/Kotlin classes to IntelliJ's specialized com.intellij.util implementations.

Candidates for Migration

• ArrayList -> SmartList (for potentially empty/small lists)
• HashMap / ConcurrentHashMap -> ContainerUtil maps
• String manipulation -> StringUtil (e.g., isEmpty, join, notNullize)
• Path / File string manipulation -> PathUtil
• javax.swing.Timer -> Alarm (for UI-related callbacks/debouncing)
• Null checks -> ObjectUtils (e.g., doIfNotNull, coalesce)
• Array resizing/merging -> ArrayUtil

Workflow Instructions