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.SumOfDoubleProcedure<T> implements org.eclipse.collections.api.block.procedure.Procedure<T>, org.eclipse.collections.impl.block.procedure.DoubleSumResultHolder
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.eclipse.collections.impl.block.procedure.SumOfDoubleProcedure
  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.DoubleFunction<? super T> function;
    descriptor: Lorg/eclipse/collections/api/block/function/primitive/DoubleFunction;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: Lorg/eclipse/collections/api/block/function/primitive/DoubleFunction<-TT;>;

  private double result;
    descriptor: D
    flags: (0x0002) ACC_PRIVATE

  private double compensation;
    descriptor: D
    flags: (0x0002) ACC_PRIVATE

  public void <init>(org.eclipse.collections.api.block.function.primitive.DoubleFunction<? super T>);
    descriptor: (Lorg/eclipse/collections/api/block/function/primitive/DoubleFunction;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.eclipse.collections.impl.block.procedure.SumOfDoubleProcedure this
        start local 1 // org.eclipse.collections.api.block.function.primitive.DoubleFunction function
         0: .line 29
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 31
            aload 0 /* this */
            aload 1 /* function */
            putfield org.eclipse.collections.impl.block.procedure.SumOfDoubleProcedure.function:Lorg/eclipse/collections/api/block/function/primitive/DoubleFunction;
         2: .line 32
            return
        end local 1 // org.eclipse.collections.api.block.function.primitive.DoubleFunction function
        end local 0 // org.eclipse.collections.impl.block.procedure.SumOfDoubleProcedure this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    3     0      this  Lorg/eclipse/collections/impl/block/procedure/SumOfDoubleProcedure<TT;>;
            0    3     1  function  Lorg/eclipse/collections/api/block/function/primitive/DoubleFunction<-TT;>;
    Signature: (Lorg/eclipse/collections/api/block/function/primitive/DoubleFunction<-TT;>;)V
    MethodParameters:
          Name  Flags
      function  

  public double getResult();
    descriptor: ()D
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // org.eclipse.collections.impl.block.procedure.SumOfDoubleProcedure this
         0: .line 37
            aload 0 /* this */
            getfield org.eclipse.collections.impl.block.procedure.SumOfDoubleProcedure.result:D
            dreturn
        end local 0 // org.eclipse.collections.impl.block.procedure.SumOfDoubleProcedure this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/eclipse/collections/impl/block/procedure/SumOfDoubleProcedure<TT;>;

  public double getCompensation();
    descriptor: ()D
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // org.eclipse.collections.impl.block.procedure.SumOfDoubleProcedure this
         0: .line 43
            aload 0 /* this */
            getfield org.eclipse.collections.impl.block.procedure.SumOfDoubleProcedure.compensation:D
            dreturn
        end local 0 // org.eclipse.collections.impl.block.procedure.SumOfDoubleProcedure this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/eclipse/collections/impl/block/procedure/SumOfDoubleProcedure<TT;>;

  public void value();
    descriptor: (Ljava/lang/Object;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=6, args_size=2
        start local 0 // org.eclipse.collections.impl.block.procedure.SumOfDoubleProcedure this
        start local 1 // java.lang.Object each
         0: .line 49
            aload 0 /* this */
            getfield org.eclipse.collections.impl.block.procedure.SumOfDoubleProcedure.function:Lorg/eclipse/collections/api/block/function/primitive/DoubleFunction;
            aload 1 /* each */
            invokeinterface org.eclipse.collections.api.block.function.primitive.DoubleFunction.doubleValueOf:(Ljava/lang/Object;)D
            aload 0 /* this */
            getfield org.eclipse.collections.impl.block.procedure.SumOfDoubleProcedure.compensation:D
            dsub
            dstore 2 /* adjustedValue */
        start local 2 // double adjustedValue
         1: .line 50
            aload 0 /* this */
            getfield org.eclipse.collections.impl.block.procedure.SumOfDoubleProcedure.result:D
            dload 2 /* adjustedValue */
            dadd
            dstore 4 /* nextSum */
        start local 4 // double nextSum
         2: .line 51
            aload 0 /* this */
            dload 4 /* nextSum */
            aload 0 /* this */
            getfield org.eclipse.collections.impl.block.procedure.SumOfDoubleProcedure.result:D
            dsub
            dload 2 /* adjustedValue */
            dsub
            putfield org.eclipse.collections.impl.block.procedure.SumOfDoubleProcedure.compensation:D
         3: .line 52
            aload 0 /* this */
            dload 4 /* nextSum */
            putfield org.eclipse.collections.impl.block.procedure.SumOfDoubleProcedure.result:D
         4: .line 53
            return
        end local 4 // double nextSum
        end local 2 // double adjustedValue
        end local 1 // java.lang.Object each
        end local 0 // org.eclipse.collections.impl.block.procedure.SumOfDoubleProcedure this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0    5     0           this  Lorg/eclipse/collections/impl/block/procedure/SumOfDoubleProcedure<TT;>;
            0    5     1           each  TT;
            1    5     2  adjustedValue  D
            2    5     4        nextSum  D
    Signature: (TT;)V
    MethodParameters:
      Name  Flags
      each  
}
Signature: <T:Ljava/lang/Object;>Ljava/lang/Object;Lorg/eclipse/collections/api/block/procedure/Procedure<TT;>;Lorg/eclipse/collections/impl/block/procedure/DoubleSumResultHolder;
SourceFile: "SumOfDoubleProcedure.java"