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import java.util.Set;

public class BuilderExample {
	private long created;
	private String name;
	private int age;
	private Set<String> occupations;
	
	BuilderExample(String name, int age, Set<String> occupations) {
		this.name = name;
		this.age = age;
		this.occupations = occupations;
	}
	
	private static long $default$created() {
		return System.currentTimeMillis();
	}
	
	public static BuilderExampleBuilder builder() {
		return new BuilderExampleBuilder();
	}
	
	public static class BuilderExampleBuilder {
		private long created;
		private boolean created$set;
		private String name;
		private int age;
		private java.util.ArrayList<String> occupations;
		
		BuilderExampleBuilder() {
		}
		
		public BuilderExampleBuilder created(long created) {
			this.created = created;
			this.created$set = true;
			return this;
		}
		
		public BuilderExampleBuilder name(String name) {
			this.name = name;
			return this;
		}
		
		public BuilderExampleBuilder age(int age) {
			this.age = age;
			return this;
		}
		
		public BuilderExampleBuilder occupation(String occupation) {
			if (this.occupations == null) {
				this.occupations = new java.util.ArrayList<String>();
			}
			
			this.occupations.add(occupation);
			return this;
		}
		
		public BuilderExampleBuilder occupations(Collection<? extends String> occupations) {
			if (this.occupations == null) {
				this.occupations = new java.util.ArrayList<String>();
			}

			this.occupations.addAll(occupations);
			return this;
		}
		
		public BuilderExampleBuilder clearOccupations() {
			if (this.occupations != null) {
				this.occupations.clear();
			}
			
			return this;
		}

		public BuilderExample build() {
			// complicated switch statement to produce a compact properly sized immutable set omitted.
			// go to https://projectlombok.org/features/Singular-snippet.html to see it.
			Set<String> occupations = ...;
			return new BuilderExample(created$set ? created : BuilderExample.$default$created(), name, age, occupations);
		}
		
		@java.lang.Override
		public String toString() {
			return "BuilderExample.BuilderExampleBuilder(created = " + this.created + ", name = " + this.name + ", age = " + this.age + ", occupations = " + this.occupations + ")";
		}
	}
}