public DrawableTypeRequest<String> fromString() {
        return loadGeneric(String.class);
    }
Returns a request builder that loads data from {@link String}s using an empty signature.

<p>
    Note - this method caches data using only the given String as the cache key. If the data is a Uri outside of
    your control, or you otherwise expect the data represented by the given String to change without the String
    identifier changing, Consider using
    {@link GenericRequestBuilder#signature(Key)} to mixin a signature
    you create that identifies the data currently at the given String that will invalidate the cache if that data
    changes. Alternatively, using {@link DiskCacheStrategy#NONE} and/or
    {@link DrawableRequestBuilder#skipMemoryCache(boolean)} may be appropriate.
</p>

@see #from(Class)
@see #load(String)
core/src/main/java/com/bumptech/glide/RequestManager.java