@Throws(IOException::class)
    fun parse(responseHeaders: Headers): WebSocketExtensions {
      // Note that this code does case-insensitive comparisons, even though the spec doesn't specify
      // whether extension tokens and parameters are case-insensitive or not.

      var compressionEnabled = false
      var clientMaxWindowBits: Int? = null
      var clientNoContextTakeover = false

package okhttp3.internal.http2

import okio.ByteString
import okio.ByteString.Companion.encodeUtf8

/** HTTP header: the name is an ASCII string, but the value can be UTF-8. */
data class Header(
  /** Name in case-insensitive ASCII encoding. */
  @JvmField val name: ByteString,
  /** Value in UTF-8 encoding. */
  @JvmField val value: ByteString,
) {
  @JvmField val hpackSize = 32 + name.size + value.size

 * governing permissions and limitations under the License.
 */
package org.codelibs.core.collection;

import java.util.Map;

/**
 * {@link ArrayMap} that is case-insensitive for keys.
 *
 * @author higa
 * @param <V> the type of values
 */
public class CaseInsensitiveMap<V> extends ArrayMap<String, V> {

    private static final long serialVersionUID = 1L;

    /**

import java.io.Serializable;
import java.util.AbstractSet;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

/**
 * {@link Set} that is case-insensitive.
 *
 * @author higa
 */
public class CaseInsensitiveSet extends AbstractSet<String> implements Set<String>, Serializable {

    static final long serialVersionUID = 0L;

            )
        else:
            return None

    def _create_credentials_fetcher(self):
        method = self.METHOD

        def fetch_credentials():
            # HTTP headers are case insensitive filter out
            # all duplicate headers and pick one.
            headers = {}
            headers['content-type'] = 'application/x-www-form-urlencoded'
            headers['authorization'] = urllib3.make_headers(

        } catch (IllegalArgumentException e) {
            logger.warn(
                    "Invalid value specified for property {}: '{}'. Supported values are (case insensitive): {}",
                    Constants.MAVEN_PLUGIN_VALIDATION,
                    level,
                    Arrays.toString(ValidationReportLevel.values()));
            return DEFAULT_VALIDATION_LEVEL;
        }

But a variable like `user-agent` is invalid in Python.

So, by default, `Header` will convert the parameter names characters from underscore (`_`) to hyphen (`-`) to extract and document the headers.

Also, HTTP headers are case-insensitive, so, you can declare them with standard Python style (also known as "snake_case").

    }

    /**
     * Retrieves related queries for a given search term.
     * The search is performed using the current virtual host context and
     * the query term is converted to lowercase for case-insensitive matching.
     *
     * @param query the search term to find related queries for
     * @return an array of related query strings, or empty array if none found
     */

		etag = metadata["md5Sum"]
	}
	// Success.
	return etag
}

// HasPrefix - Prefix matcher string matches prefix in a platform specific way.
// For example on windows since its case insensitive we are supposed
// to do case insensitive checks.
func HasPrefix(s string, prefix string) bool {
	if runtime.GOOS == globalWindowsOSName {
		return stringsHasPrefixFold(s, prefix)
	}
	return strings.HasPrefix(s, prefix)
}

            assertEquals("application/octet-stream", mimeMap.getMimeType("doesnotexist"));
        }

        @Test
        @DisplayName("Should handle case insensitive extensions")
        void testCaseInsensitiveExtensions() throws IOException {
            assertEquals("application/pdf", mimeMap.getMimeType("PDF"));
            assertEquals("application/pdf", mimeMap.getMimeType("Pdf"));