JsonCacheHollow class
Hollow (empty) JsonCache — It is intended to serve as a placeholder for JsonCache instances.
There will always be at most one JsonCacheHollow object in memory during
program execution. It doesn't matter how many times someone instantiates
objects using const JsonCacheHollow().
hollow
having a hole or empty space inside:
- a hollow tube
- Hollow blocks are used because they are lighter
- a hollow log — Cambridge Dictionary
- Implemented types
Constructors
- JsonCacheHollow()
-
This const constructor ensures that there will be only one
JsonCacheHollow instance throughout the program.
const
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
clear(
) → Future< void> -
Does nothing.
override
-
contains(
String key) → Future< bool> -
Always returns
false.override -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
refresh(
String key, Map< String, dynamic> value) → Future<void> -
Does nothing.
override
-
remove(
String key) → Future< void> -
Does nothing.
override
-
toString(
) → String -
A string representation of this object.
inherited
-
value(
String key) → Future< Map< String, dynamic> ?> -
Always returns
null.override
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited