Access Wideners

Creating the file

The first step is to create a file called [your project name].accessWidener. This normally goes in the same directory as your fabric.mod.json.

On the first line of your new file, put the following:

accessWidener	v1 named

Then on any of the following lines, you can put a description of a class, method, or field that you wish to widen access to.

Class Access

To widen access to a class, the following format must be used:

<access> class <className>

<access> can be either extendable or accessible. <className> should be the full name of the class. If the class is a subclass of another class, then the format of the name should follow <outerClass>$<innerClass>. Here's a couple examples:

accessible class net/minecraft/client/render/model/WeightedBakedModel$Entry
extendable class net/minecraft/util/profiler/ProfilerTiming

Method Access

To widen access to a method, the following format must be used:

<access> method <className> <methodName> <methodDesc>

Like classes, method <access> can either be extendable or accessible. <className> should be the full name of the class which contains the method. <methodName> should be the full name of the method to widen access to. <methodDesc> should be the descriptor for the method's arguments. Here's an example:

extendable method net/minecraft/resource/NamespaceResourceManager validate (Lnet/minecraft/util/Identifier;)V

Field Access

To widen access to a field, the following format must be used:

<access> field <className> <fieldName> <fieldDesc>

<access> can either be accessible or mutable. <className> should be the full name of the class which contains the method. <fieldName> should be the full name of the field to widen access to. <fieldDesc> should be the descriptor for the type of the field. Here's an example:

accessible field net/minecraft/client/render/model/WeightedBakedModel models Ljava/util/List;

Examples

# Classes
accessible class net/minecraft/client/render/model/WeightedBakedModel$Entry
extendable class net/minecraft/util/profiler/ProfilerTiming

# Methods
extendable method net/minecraft/resource/NamespaceResourceManager validate (Lnet/minecraft/util/Identifier;)V
accessible method net/minecraft/resource/NamespaceResourceManager validate (Lnet/minecraft/util/Identifier;)V

# Fields
accessible field net/minecraft/client/render/model/WeightedBakedModel models Ljava/util/List;
mutable field net/minecraft/resource/ResourceType directory Ljava/lang/String;
mutable field net/minecraft/resource/DefaultResourcePack LOGGER Lorg/apache/logging/log4j/Logger;