Field class Null safety

A Field provides information about a Dart language field or variable.

Implemented types


Field({required String? name, required ObjRef? owner, required InstanceRef? declaredType, required bool? isConst, required bool? isFinal, required bool? isStatic, required String id, SourceLocation? location, dynamic staticValue})


classRef ClassRef?
If an object is allocated in the Dart heap, it will have a corresponding class object.
@optional, read / write, inherited
declaredType InstanceRef?
The declared type of this field.
read / write, override
fixedId bool?
Provided and set to true if the id of an Object is fixed. If true, the id of an Object is guaranteed not to change or expire. The object may, however, still be Collected.
@optional, read / write, inherited
hashCode int
The hash code for this object.
read-only, override
id String?
A unique identifier for an Object. Passed to the getObject RPC to reload this Object.
read / write, inherited
isConst bool?
Is this field const?
read / write, override
isFinal bool?
Is this field final?
read / write, override
isStatic bool?
Is this field static?
read / write, override
json Map<String, dynamic>?
read / write, inherited
location SourceLocation?
The location of this field in the source code.
@optional, read / write, override
name String?
The name of this field.
read / write, override
owner ObjRef?
The owner of this field, which can be either a Library or a Class.
read / write, override
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
size int?
The size of this object in the heap.
@optional, read / write, inherited
staticValue ↔ dynamic
The value of this field, if the field is static. If uninitialized, this will take the value of an uninitialized Sentinel.
@optional, read / write
type String
read-only, override


noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
toJson() Map<String, dynamic>
toString() String
A string representation of this object.


operator ==(Object other) bool
The equality operator.

Static Methods

parse(Map<String, dynamic>? json) Field?