Unable to create converter for my class in Android Retrofit library

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If anyone ever comes across this in the future because you are trying to define your own custom converter factory and are getting this error, it can also be caused by having multiple variables in a class with a misspelled or the same serialized name. IE:

public class foo {
  @SerializedName("name")
  String firstName;
  @SerializedName("name")
  String lastName;
}

Having serialized names defined twice (likely by mistake) will also throw this exact same error.

Update: Keep in mind that this logic also holds true via inheritance. If you extend to a parent class with an object that has the same Serialized name as you do in the sub-class, it will cause this same problem.

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