https://github.com/eclipse/eclipse-collections/eclipse-collections: Eclipse Collections is a collections framework for Java. It has JDK-compatible List, Set and Map implementations with a rich API and set of utility classes that work with any JDK compatible Collections, Arrays, Maps or Strings. The iteration protocol was inspired by the Smalltalk collection framework.
  • Craig P. Motlin
  • Donald Raab
  • Mohammad A. Rezaei
  • Hiroshi Ito
  • Nikhil J. Nanivadekar 
final class org.eclipse.collections.impl.block.factory.Functions$FirstNotNullFunction<T, V> implements org.eclipse.collections.api.block.function.Function<T, V>
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: org.eclipse.collections.impl.block.factory.Functions$FirstNotNullFunction
  super_class: java.lang.Object
{
  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 1

  private final org.eclipse.collections.api.block.function.Function<T, V>[] functions;
    descriptor: [Lorg/eclipse/collections/api/block/function/Function;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: [Lorg/eclipse/collections/api/block/function/Function<TT;TV;>;

  private void <init>(org.eclipse.collections.api.block.function.Function<T, V>[]);
    descriptor: ([Lorg/eclipse/collections/api/block/function/Function;)V
    flags: (0x0082) ACC_PRIVATE, ACC_VARARGS
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.eclipse.collections.impl.block.factory.Functions$FirstNotNullFunction this
        start local 1 // org.eclipse.collections.api.block.function.Function[] functions
         0: .line 528
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 530
            aload 0 /* this */
            aload 1 /* functions */
            putfield org.eclipse.collections.impl.block.factory.Functions$FirstNotNullFunction.functions:[Lorg/eclipse/collections/api/block/function/Function;
         2: .line 531
            return
        end local 1 // org.eclipse.collections.api.block.function.Function[] functions
        end local 0 // org.eclipse.collections.impl.block.factory.Functions$FirstNotNullFunction this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    3     0       this  Lorg/eclipse/collections/impl/block/factory/Functions$FirstNotNullFunction<TT;TV;>;
            0    3     1  functions  [Lorg/eclipse/collections/api/block/function/Function;
    Signature: ([Lorg/eclipse/collections/api/block/function/Function<TT;TV;>;)V
    MethodParameters:
           Name  Flags
      functions  

  public V valueOf();
    descriptor: (Ljava/lang/Object;)Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=7, args_size=2
        start local 0 // org.eclipse.collections.impl.block.factory.Functions$FirstNotNullFunction this
        start local 1 // java.lang.Object object
         0: .line 536
            aload 0 /* this */
            getfield org.eclipse.collections.impl.block.factory.Functions$FirstNotNullFunction.functions:[Lorg/eclipse/collections/api/block/function/Function;
            dup
            astore 5
            arraylength
            istore 4
            iconst_0
            istore 3
            goto 6
      StackMap locals: org.eclipse.collections.impl.block.factory.Functions$FirstNotNullFunction java.lang.Object top int int org.eclipse.collections.api.block.function.Function[]
      StackMap stack:
         1: aload 5
            iload 3
            aaload
            astore 2 /* function */
        start local 2 // org.eclipse.collections.api.block.function.Function function
         2: .line 538
            aload 2 /* function */
            aload 1 /* object */
            invokeinterface org.eclipse.collections.api.block.function.Function.valueOf:(Ljava/lang/Object;)Ljava/lang/Object;
            astore 6 /* result */
        start local 6 // java.lang.Object result
         3: .line 539
            aload 6 /* result */
            ifnull 5
         4: .line 541
            aload 6 /* result */
            areturn
        end local 6 // java.lang.Object result
        end local 2 // org.eclipse.collections.api.block.function.Function function
         5: .line 536
      StackMap locals:
      StackMap stack:
            iinc 3 1
      StackMap locals:
      StackMap stack:
         6: iload 3
            iload 4
            if_icmplt 1
         7: .line 544
            aconst_null
            areturn
        end local 1 // java.lang.Object object
        end local 0 // org.eclipse.collections.impl.block.factory.Functions$FirstNotNullFunction this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    8     0      this  Lorg/eclipse/collections/impl/block/factory/Functions$FirstNotNullFunction<TT;TV;>;
            0    8     1    object  TT;
            2    5     2  function  Lorg/eclipse/collections/api/block/function/Function<TT;TV;>;
            3    5     6    result  TV;
    Signature: (TT;)TV;
    MethodParameters:
        Name  Flags
      object  
}
Signature: <T:Ljava/lang/Object;V:Ljava/lang/Object;>Ljava/lang/Object;Lorg/eclipse/collections/api/block/function/Function<TT;TV;>;
SourceFile: "Functions.java"
NestHost: org.eclipse.collections.impl.block.factory.Functions
InnerClasses:
  private final FirstNotNullFunction = org.eclipse.collections.impl.block.factory.Functions$FirstNotNullFunction of org.eclipse.collections.impl.block.factory.Functions