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 
public abstract class org.eclipse.collections.impl.block.function.checked.CheckedFunction0<R> implements org.eclipse.collections.api.block.function.Function0<R>, org.eclipse.collections.impl.block.function.checked.ThrowingFunction0<R>
  minor version: 0
  major version: 59
  flags: flags: (0x0421) ACC_PUBLIC, ACC_SUPER, ACC_ABSTRACT
  this_class: org.eclipse.collections.impl.block.function.checked.CheckedFunction0
  super_class: java.lang.Object
{
  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 1

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.eclipse.collections.impl.block.function.checked.CheckedFunction0 this
         0: .line 15
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.eclipse.collections.impl.block.function.checked.CheckedFunction0 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/eclipse/collections/impl/block/function/checked/CheckedFunction0<TR;>;

  public final R value();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0011) ACC_PUBLIC, ACC_FINAL
    Code:
      stack=4, locals=2, args_size=1
        start local 0 // org.eclipse.collections.impl.block.function.checked.CheckedFunction0 this
         0: .line 25
            aload 0 /* this */
            invokevirtual org.eclipse.collections.impl.block.function.checked.CheckedFunction0.safeValue:()Ljava/lang/Object;
         1: areturn
         2: .line 27
      StackMap locals:
      StackMap stack: java.lang.RuntimeException
            astore 1 /* e */
        start local 1 // java.lang.RuntimeException e
         3: .line 29
            aload 1 /* e */
            athrow
        end local 1 // java.lang.RuntimeException e
         4: .line 31
      StackMap locals:
      StackMap stack: java.lang.Exception
            astore 1 /* e */
        start local 1 // java.lang.Exception e
         5: .line 33
            new java.lang.RuntimeException
            dup
            ldc "Checked exception caught in Function0"
            aload 1 /* e */
            invokespecial java.lang.RuntimeException.<init>:(Ljava/lang/String;Ljava/lang/Throwable;)V
            athrow
        end local 1 // java.lang.Exception e
        end local 0 // org.eclipse.collections.impl.block.function.checked.CheckedFunction0 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    6     0  this  Lorg/eclipse/collections/impl/block/function/checked/CheckedFunction0<TR;>;
            3    4     1     e  Ljava/lang/RuntimeException;
            5    6     1     e  Ljava/lang/Exception;
      Exception table:
        from    to  target  type
           0     1       2  Class java.lang.RuntimeException
           0     1       4  Class java.lang.Exception
    Signature: ()TR;
}
Signature: <R:Ljava/lang/Object;>Ljava/lang/Object;Lorg/eclipse/collections/api/block/function/Function0<TR;>;Lorg/eclipse/collections/impl/block/function/checked/ThrowingFunction0<TR;>;
SourceFile: "CheckedFunction0.java"