Add existing to tracked

node_modules/@cesium/engine/Source/Scene/getMetadataClassProperty.js

@@ -0,0 +1,43 @@
+import defined from "../Core/defined.js";
+
+/**
+ * Return the `MetadataClassProperty` from the given schema that
+ * matches the given description.
+ *
+ * If the given schema is `undefined`, then `undefined` is returned.
+ * If the given `schemaId` is defined but does not match the ID
+ * of the given schema, then `undefined` is returned.
+ * If the given schema does not have a class with the given name,
+ * or the class does not have a property with the given name,
+ * then `undefined` is returned.
+ *
+ * Otherwise, the `MetadataClassProperty` is returned.
+ *
+ * @param {object} schema The schema object
+ * @param {string|undefined} schemaId The ID of the metadata schema
+ * @param {string} className The name of the metadata class
+ * @param {string} propertyName The name of the metadata property
+ * @returns {MetadataClassProperty|undefined}
+ * @private
+ */
+function getMetadataClassProperty(schema, schemaId, className, propertyName) {
+  if (!defined(schema)) {
+    return undefined;
+  }
+  if (defined(schemaId) && schema.id !== schemaId) {
+    return undefined;
+  }
+  const classes = schema.classes || {};
+  const metadataClass = classes[className];
+  if (!defined(metadataClass)) {
+    return undefined;
+  }
+  const properties = metadataClass.properties || {};
+  const metadataProperty = properties[propertyName];
+  if (!defined(metadataProperty)) {
+    return undefined;
+  }
+  return metadataProperty;
+}
+
+export default getMetadataClassProperty;