if (pos == current) {
                newClientMap.put(Pattern.compile(regex), client);
                added = true;
            }
            newClientMap.put(entry.getKey(), entry.getValue());
            current++;
        }
        if (!added) {
            newClientMap.put(Pattern.compile(regex), client);
        }
        clientMap = newClientMap;
    }

    /**

    String LATEST_VERSION = "LATEST";

    String SNAPSHOT_VERSION = "SNAPSHOT";

    Pattern VERSION_FILE_PATTERN = Pattern.compile("^(.*)-(\\d{8}\\.\\d{6})-(\\d+)$");

    // TODO into artifactScope handler

    String SCOPE_COMPILE = "compile";

    String SCOPE_COMPILE_PLUS_RUNTIME = "compile+runtime";

    String SCOPE_TEST = "test";

    String SCOPE_RUNTIME = "runtime";

	c.processor.callbacks = append(c.processor.callbacks, c)
	return c.processor.compile()
}

func (c *callback) Remove(name string) error {
	c.processor.db.Logger.Warn(context.Background(), "removing callback `%s` from %s\n", name, utils.FileWithLineNum())
	c.name = name
	c.remove = true
	c.processor.callbacks = append(c.processor.callbacks, c)
	return c.processor.compile()
}

func (c *callback) Replace(name string, fn func(*DB)) error {

        DEPENDENCY_GRAPH_EXCLUDE_CONFIGURATIONS: 'ktlint|checkstyle|.*[Tt]est(Compile|Runtime)Classpath|.*[Tt]estImplementationDependenciesMetadata|.*[Tt]estFixtures(Compile|Runtime)Classpath|.*[Tt]estFixturesImplementationDependenciesMetadata'...

            Pattern.compile("^user-agent:\\s*([^\\t\\n\\x0B\\f\\r]+)\\s*$", Pattern.CASE_INSENSITIVE);

    /** Pattern for parsing disallow records. */
    protected static final Pattern DISALLOW_RECORD = Pattern.compile("^disallow:\\s*([^\\s]*)\\s*$", Pattern.CASE_INSENSITIVE);

    /** Pattern for parsing allow records. */

    private static final Pattern TRAVERSAL_PATTERN = Pattern.compile("\\.\\.[\\\\/]|[\\\\/]\\.\\.");
    private static final Pattern DOUBLE_DOT_PATTERN = Pattern.compile("\\.\\.");
    private static final Pattern ENCODED_TRAVERSAL = Pattern.compile("%2e%2e|%252e%252e", Pattern.CASE_INSENSITIVE);
    private static final Pattern UNICODE_TRAVERSAL = Pattern.compile("\\\\u002e\\\\u002e|\\\\u002E\\\\u002E", Pattern.CASE_INSENSITIVE);

# architectures.
#
# Originally the Go build system used it as a smoke test to quickly
# flag portability issues in builders named "misc-compile" or "all-compile".
# As of CL 464955, the build system uses make.bash -compile-only instead,
# so this script no longer runs in any automated fashion.
#
# Options:
#   -e: stop at first failure

if [ ! -f run.bash ]; then

    /**
     * Pattern for XML encoding.
     */
    protected Pattern xmlEncodingPattern =
            Pattern.compile("<\\?xml.*encoding\\s*=\\s*['\"]([\\w\\d\\-_]*)['\"]\\s*\\?>", Pattern.MULTILINE | Pattern.CASE_INSENSITIVE);

    /**
     * Pattern for XML tags.
     */
    protected Pattern xmlTagPattern = Pattern.compile("<[^>]+>");

    /**
     * Returns the encoding pattern.
     * @return The encoding pattern.
     */

    return new JdkPatternCompiler();
  }

  private static final class JdkPatternCompiler implements PatternCompiler {
    @Override
    public CommonPattern compile(String pattern) {
      return new JdkPattern(Pattern.compile(pattern));
    }

    @Override
    public boolean isPcreLike() {
      return true;
    }
  }

    Iterable<String> words = Splitter.on(Pattern.compile("\\b")).split(string);
    assertThat(words).containsExactly("foo", "<", "bar", ">", "bletch").inOrder();
  }

  @GwtIncompatible // java.util.regex.Pattern
  public void testPatternSplitWordBoundary_singleCharInput() {
    String string = "f";
    Iterable<String> words = Splitter.on(Pattern.compile("\\b")).split(string);