Bug 65378 FindOccurencesCUEngine should use ASTProvider
RC1 FindOccurrencesEngine should get the AST from the ASTProvider so it can profit if the AST is already cached (2 occurences) e.g. JaavPlugin.getDefault().getASTProvider().getAST(cu)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/search/FindOccurrencesEngine.java
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package org.eclipse.jdt.internal.ui.search;
import java.util.Map;
import org.eclipse.core.resources.IMarker;
import org.eclipse.core.resources.IResource;