@Query overwrites previously defined methods

[stelcheck]

// @ObjectType creates GraphQLObjectType from a class
@ObjectType()
class QueryType {
  public prefix = 'Hello'
  @Field() public greeting(): string {
    return `${this.prefix}, world!`
  }

  @Field() public original(): string {
    return `${this.prefix}, world!`
  }
}

// @ObjectType creates GraphQLObjectType from a class
@ObjectType()
class QueryType2 {
  public prefix = 'Hi'
  @Field() public greeting(): string {
      return `${this.prefix}, world!`
  }
}

// @Schema creates GraphQLSchema from a class.
// The class should have a field annotated by @Query decorator.
@Schema()
class SchemaType {
    @Query() public query1: QueryType
    @Query() public query2: QueryType2

}

original remains callable, but now there are no longer any ways of calling the original greeting from QueryType.