Simplify EnvironmentUtils (maybe could be deleted?)

spring-cloud-context/src/main/java/org/springframework/cloud/env/EnvironmentUtils.java

@@ -1,44 +1,20 @@
 package org.springframework.cloud.env;
 
-import org.springframework.core.env.ConfigurableEnvironment;
-import org.springframework.core.env.EnumerablePropertySource;
-import org.springframework.core.env.Environment;
-import org.springframework.core.env.PropertySource;
-import org.springframework.core.env.PropertySources;
-
 import java.util.Collections;
-import java.util.LinkedHashMap;
 import java.util.Map;
 
+import org.springframework.boot.context.properties.bind.Bindable;
+import org.springframework.boot.context.properties.bind.Binder;
+import org.springframework.core.env.Environment;
+
 /**
  * @author Spencer Gibb
  */
 public class EnvironmentUtils {
-	public static Map<String, Object> getSubProperties(Environment environment, String keyPrefix) {
-		if (environment instanceof ConfigurableEnvironment) {
-			ConfigurableEnvironment env = (ConfigurableEnvironment) environment;
-			Map<String, Object> subProperties = new LinkedHashMap<>();
-			PropertySources propertySources = env.getPropertySources();
-			for (PropertySource<?> source : propertySources) {
-				if (source instanceof EnumerablePropertySource) {
-					for (String name : ((EnumerablePropertySource<?>) source)
-							.getPropertyNames()) {
-						String key = getSubKey(name, keyPrefix);
-						if (key != null && !subProperties.containsKey(key)) {
-							subProperties.put(key, source.getProperty(name));
-						}
-					}
-				}
-			}
-			return Collections.unmodifiableMap(subProperties);
-		}
-		return Collections.emptyMap();
-	}
-
-	private static String getSubKey(String name, String keyPrefix) {
-		if (name.startsWith(keyPrefix)) {
-			return name.substring(keyPrefix.length());
-		}
-		return null;
+	public static Map<String, String> getSubProperties(Environment environment,
+			String keyPrefix) {
+		return Binder.get(environment)
+				.bind(keyPrefix, Bindable.mapOf(String.class, String.class))
+				.orElseGet(Collections::emptyMap);
 	}
 }