in javac-ast-extension/src/org/jetbrains/jps/javac/ast/JavacReferenceCollectorListener.java [213:219]
private boolean isPackageInfo(String filePath) {
if (filePath != null && filePath.endsWith(PACKAGE_INFO_SRC_FILENAME)) {
final int idx = filePath.length() - PACKAGE_INFO_SRC_FILENAME.length() - 1;
return idx >= 0 && (filePath.charAt(idx) == '/' || filePath.charAt(idx) == File.separatorChar);
}
return false;
}