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 class org.eclipse.collections.impl.block.procedure.SumOfLongProcedure<T> implements org.eclipse.collections.api.block.procedure.Procedure<T>
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.eclipse.collections.impl.block.procedure.SumOfLongProcedure
  super_class: java.lang.Object
{
  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 2

  private final org.eclipse.collections.api.block.function.primitive.LongFunction<? super T> function;
    descriptor: Lorg/eclipse/collections/api/block/function/primitive/LongFunction;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: Lorg/eclipse/collections/api/block/function/primitive/LongFunction<-TT;>;

  private long result;
    descriptor: J
    flags: (0x0002) ACC_PRIVATE

  public void <init>(org.eclipse.collections.api.block.function.primitive.LongFunction<? super T>);
    descriptor: (Lorg/eclipse/collections/api/block/function/primitive/LongFunction;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.eclipse.collections.impl.block.procedure.SumOfLongProcedure this
        start local 1 // org.eclipse.collections.api.block.function.primitive.LongFunction function
         0: .line 28
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 30
            aload 0 /* this */
            aload 1 /* function */
            putfield org.eclipse.collections.impl.block.procedure.SumOfLongProcedure.function:Lorg/eclipse/collections/api/block/function/primitive/LongFunction;
         2: .line 31
            return
        end local 1 // org.eclipse.collections.api.block.function.primitive.LongFunction function
        end local 0 // org.eclipse.collections.impl.block.procedure.SumOfLongProcedure this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    3     0      this  Lorg/eclipse/collections/impl/block/procedure/SumOfLongProcedure<TT;>;
            0    3     1  function  Lorg/eclipse/collections/api/block/function/primitive/LongFunction<-TT;>;
    Signature: (Lorg/eclipse/collections/api/block/function/primitive/LongFunction<-TT;>;)V
    MethodParameters:
          Name  Flags
      function  

  public long getResult();
    descriptor: ()J
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // org.eclipse.collections.impl.block.procedure.SumOfLongProcedure this
         0: .line 35
            aload 0 /* this */
            getfield org.eclipse.collections.impl.block.procedure.SumOfLongProcedure.result:J
            lreturn
        end local 0 // org.eclipse.collections.impl.block.procedure.SumOfLongProcedure this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/eclipse/collections/impl/block/procedure/SumOfLongProcedure<TT;>;

  public void value();
    descriptor: (Ljava/lang/Object;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=2, args_size=2
        start local 0 // org.eclipse.collections.impl.block.procedure.SumOfLongProcedure this
        start local 1 // java.lang.Object each
         0: .line 41
            aload 0 /* this */
            dup
            getfield org.eclipse.collections.impl.block.procedure.SumOfLongProcedure.result:J
            aload 0 /* this */
            getfield org.eclipse.collections.impl.block.procedure.SumOfLongProcedure.function:Lorg/eclipse/collections/api/block/function/primitive/LongFunction;
            aload 1 /* each */
            invokeinterface org.eclipse.collections.api.block.function.primitive.LongFunction.longValueOf:(Ljava/lang/Object;)J
            ladd
            putfield org.eclipse.collections.impl.block.procedure.SumOfLongProcedure.result:J
         1: .line 42
            return
        end local 1 // java.lang.Object each
        end local 0 // org.eclipse.collections.impl.block.procedure.SumOfLongProcedure this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/eclipse/collections/impl/block/procedure/SumOfLongProcedure<TT;>;
            0    2     1  each  TT;
    Signature: (TT;)V
    MethodParameters:
      Name  Flags
      each  
}
Signature: <T:Ljava/lang/Object;>Ljava/lang/Object;Lorg/eclipse/collections/api/block/procedure/Procedure<TT;>;
SourceFile: "SumOfLongProcedure.java"