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SimpleChanges
interface
A hashtable of changes represented by SimpleChange objects stored at the declared property name they belong to on a Directive or Component. This is the type passed to the ngOnChanges hook.
interface SimpleChanges {
  __index(propName: string): SimpleChange
}
   See also
Methods
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          __index() 
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Licensed under the Creative Commons Attribution License 4.0.
 https://v9.angular.io/api/core/SimpleChanges