Add TSDocs

src/utils/common.ts

@@ -612,6 +612,10 @@ export function getShinyDescriptor(variant: Variant): string {
   }
 }
 
+/**
+ * If the input isn't already an array, turns it into one.
+ * @returns An array with the same type as the type of the input
+ */
 export function coerceArray<T>(input: T | T[]): T[] {
   return Array.isArray(input) ? input : [input];
 }