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In Flutter, you can retrieve the value of an object’s property using the . operator.

String name = person.name;

If the object is null, attempting to access a property on it will throw a NoSuchMethodError. You can prevent this by first checking if the object is null before trying to access its properties.

if (person != null) {
  String name = person.name;
}

You can also use the ?. operator to safely access the property of an object. This operator will return null if the object is null, rather than throwing an error.

String name = person?.name;

If you want to retrieve the value of a property on an object that may be null, using the ?. operator is a good way to do it safely.

If object is Map type then you can get value by key value pair using []. instead of ’.’ operator.

for example

String name = persion['name'];

You can also use the ?. operator to safely access the property of an object. This operator will return null if the object is null, rather than throwing an error.

for example:

String? name = persion?['name'];