class SomeClass { public function someMethod() { // some method code here } } $method = new ReflectionMethod('SomeClass', 'someMethod'); $declaringClass = $method->getDeclaringClass(); echo $declaringClass->getName(); // Output: SomeClass
namespace baz; class Bar { public function foo() { // some method code here } } $method = new ReflectionMethod('baz\\Bar', 'foo'); $declaringClass = $method->getDeclaringClass(); echo $declaringClass->getName(); // Output: baz\BarBased on these examples, it is difficult to determine which package or library the `ReflectionMethod` class belongs to, as it is a built-in class in PHP.