HeadersCollection::set( string $name, string|WordPress\AiClient\Providers\Http\Collections\list<string> $value ): void

99    private function set(string $name, $value): void100    {101        if (is_array($value)) {102            $normalizedValues = array_values($value);103        } else {104            // Split comma-separated string into array105            $normalizedValues = array_map('trim', explode(',', $value));106        }107        $lowerName = strtolower($name);108        // If header exists with different casing, remove the old casing109        if (isset($this->headersMap[$lowerName])) {110            $oldName = $this->headersMap[$lowerName];111            if ($oldName !== $name) {112                unset($this->headers[$oldName]);113            }114        }115        // Always use the new casing116        $this->headers[$name] = $normalizedValues;117        $this->headersMap[$lowerName] = $name;118    }