internal fun Regex.matchAtPolyfill(
  input: CharSequence,
  index: Int,
): MatchResult? {
  val candidate = find(input, index) ?: return null
  if (candidate.range.first != index) return null // Didn't match where it should have.
  return candidate
}

@JvmField
val EMPTY_BYTE_ARRAY: ByteArray = ByteArray(0)

/** Byte order marks. */
internal val UNICODE_BOMS =

        try {
            SmbFileHandleImpl h = this.handle;
            if ( h != null ) {
                h.close();
            }
        }
        catch ( SmbException se ) {
            throw seToIoe(se);
        }
        finally {
            this.tmp = null;
            this.handle = null;
            if ( this.unsharedFile ) {
                this.file.close();
            }
        }

            }
            return null;
        }
    }

    static class BaseModelResolver implements ModelResolver {
        @Override
        public ModelSource resolveModel(String groupId, String artifactId, String version)
                throws UnresolvableModelException {
            return null;
        }

        @Override

    check(null !in (interceptors as List<Interceptor?>)) {
      "Null interceptor: $interceptors"
    }
    check(null !in (networkInterceptors as List<Interceptor?>)) {
      "Null network interceptor: $networkInterceptors"
    }

    if (connectionSpecs.none { it.isTls }) {
      check(sslSocketFactoryOrNull == null)
      check(certificateChainCleaner == null)
      check(x509TrustManager == null)

          // X509TrustManagerExtensions checks for checkServerTrusted(X509Certificate[], String, String)
          null
        }

      return when {
        extensions != null -> AndroidCertificateChainCleaner(trustManager, extensions)
        else -> null
      }
    }
  }

    }

    public String getInput() {
        return input;
    }

    public String getInputValue() {
        if (input == null) {
            return StringUtil.EMPTY;
        }
        return input;
    }

    public boolean isUpdated() {
        return newInput != null;
    }

    public boolean isDeleted() {
        return isUpdated() && newInput.length() == 0;
    }

    @Override

    return (connectingEdge == null)
        ? ImmutableSet.<E>of().iterator()
        : Iterators.singletonIterator(connectingEdge);
  }

  @Override
  public int size() {
    return getConnectingEdge() == null ? 0 : 1;
  }

  @Override
  public boolean contains(@CheckForNull Object edge) {
    E connectingEdge = getConnectingEdge();
    return (connectingEdge != null && connectingEdge.equals(edge));
  }

        }
        ParameterizedType toParameterizedType = expectArgument(ParameterizedType.class, to);
        if (fromParameterizedType.getOwnerType() != null
            && toParameterizedType.getOwnerType() != null) {
          populateTypeMappings(
              mappings, fromParameterizedType.getOwnerType(), toParameterizedType.getOwnerType());
        }
        checkArgument(

        _ * property.signature >> "$name-signature"
        _ * javadocConverter.parse(property, !null) >> ({[parse("<para>${args.comment ?: 'comment'}</para>")]} as DocComment)
        return property
    }

    def propertyDoc(Map<String, ?> args = [:], String name) {
        return new PropertyDoc(classMetaData(), property(name, null), [parse("<para>$name comment</para>")], args.additionalValues ?: [])
    }

        fun store(data: Map<String, Any>, file: File, comment: String? = null) {
            store(propertiesFrom(data), file, comment)
        }

        /**
         * Writes [Properties] to a file, but without including the timestamp comment.
         *
         * See [PropertiesUtils.store].
         */
        fun store(properties: Properties, file: File, comment: String? = null) {