ImageProvider uses the global imageCache to cache images . The type argument T is the type of the object used to represent a resolved configuration. This is also the type used for the key in the image cache. It should be immutable and implement the == operator and the hashCode getter.
Read moreWhat is place holder in flutter?
Placeholder class Null safety. A widget that draws a box that represents where other widgets will one day be added . This widget is useful during development to indicate that the interface is not yet complete. By default, the placeholder is sized to fit its container.
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