Reuse MapPropertySource for DynamicValuesPropertySource implementation

Closes gh-32110

spring-core/src/main/java/org/springframework/util/function/SupplierUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -40,4 +40,16 @@ public abstract class SupplierUtils {
 		return (supplier != null ? supplier.get() : null);
 	}
 
+	/**
+	 * Resolve a given {@code Supplier}, getting its result or immediately
+	 * returning the given Object as-is if not a {@code Supplier}.
+	 * @param candidate the candidate to resolve (potentially a {@code Supplier})
+	 * @return a supplier's result or the given Object as-is
+	 * @since 6.1.4
+	 */
+	@Nullable
+	public static Object resolve(@Nullable Object candidate) {
+		return (candidate instanceof Supplier<?> supplier ? supplier.get() : null);
+	}
+
 }