Ability to modify api

api/src/main/java/com/destroystokyo/paper/Namespaced.java

@@ -0,0 +1,40 @@
+package com.destroystokyo.paper;
+
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Represents a namespaced resource, see {@link org.bukkit.NamespacedKey} for single elements
+ * or {@link com.destroystokyo.paper.NamespacedTag} for a collection of elements
+ *
+ * Namespaces may only contain lowercase alphanumeric characters, periods,
+ * underscores, and hyphens.
+ * <p>
+ * Keys may only contain lowercase alphanumeric characters, periods,
+ * underscores, hyphens, and forward slashes.
+ * <p>
+ * You should not be implementing this interface yourself, use {@link org.bukkit.NamespacedKey}
+ * or {@link com.destroystokyo.paper.NamespacedTag} as needed instead.
+ */
+public interface Namespaced {
+    /**
+     * Gets the namespace this resource is a part of
+     * <p>
+     * This is contractually obligated to only contain lowercase alphanumeric characters,
+     * periods, underscores, and hyphens.
+     *
+     * @return resource namespace
+     */
+    @NotNull
+    String getNamespace();
+
+    /**
+     * Gets the key corresponding to this resource
+     * <p>
+     * This is contractually obligated to only contain lowercase alphanumeric characters,
+     * periods, underscores, hyphens, and forward slashes.
+     *
+     * @return resource key
+     */
+    @NotNull
+    String getKey();
+}