in src/main/java/com/intellij/internal/statistic/eventLog/util/StringUtil.java [125:138]
public static boolean startsWith(@NotNull CharSequence text, int startIndex, @NotNull CharSequence prefix) {
int tl = text.length();
if (startIndex < 0 || startIndex > tl) {
throw new IllegalArgumentException("Index is out of bounds: " + startIndex + ", length: " + tl);
}
int l1 = tl - startIndex;
int l2 = prefix.length();
if (l1 < l2) return false;
for (int i = 0; i < l2; i++) {
if (text.charAt(i + startIndex) != prefix.charAt(i)) return false;
}
return true;
}