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Add UnknownFieldSet.isEmpty
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Allows callers to check if field set is empty without cloning the map

PiperOrigin-RevId: 631237925
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mhansen authored and copybara-github committed May 7, 2024
1 parent 9de810a commit c56bddd
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Original file line number Diff line number Diff line change
Expand Up @@ -83,6 +83,11 @@ public int hashCode() {
return fields.hashCode();
}

/** Whether the field set has no fields. */
public boolean isEmpty() {
return fields.isEmpty();
}

/** Get a map of fields in the set by number. */
public Map<Integer, Field> asMap() {
// Avoid an allocation for the common case of an empty map.
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