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.Predicates$AttributeTrue<T> extends org.eclipse.collections.impl.block.factory.Predicates$AttributePredicate<T, java.lang.Boolean>
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: org.eclipse.collections.impl.block.factory.Predicates$AttributeTrue
  super_class: org.eclipse.collections.impl.block.factory.Predicates$AttributePredicate
{
  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 1

  private static final org.eclipse.collections.impl.block.factory.Predicates$TrueEquals TRUE_EQUALS;
    descriptor: Lorg/eclipse/collections/impl/block/factory/Predicates$TrueEquals;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=2, locals=0, args_size=0
         0: .line 630
            new org.eclipse.collections.impl.block.factory.Predicates$TrueEquals
            dup
            invokespecial org.eclipse.collections.impl.block.factory.Predicates$TrueEquals.<init>:()V
            putstatic org.eclipse.collections.impl.block.factory.Predicates$AttributeTrue.TRUE_EQUALS:Lorg/eclipse/collections/impl/block/factory/Predicates$TrueEquals;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  private void <init>(org.eclipse.collections.api.block.function.Function<? super T, java.lang.Boolean>);
    descriptor: (Lorg/eclipse/collections/api/block/function/Function;)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // org.eclipse.collections.impl.block.factory.Predicates$AttributeTrue this
        start local 1 // org.eclipse.collections.api.block.function.Function newFunction
         0: .line 634
            aload 0 /* this */
            aload 1 /* newFunction */
            getstatic org.eclipse.collections.impl.block.factory.Predicates$AttributeTrue.TRUE_EQUALS:Lorg/eclipse/collections/impl/block/factory/Predicates$TrueEquals;
            invokespecial org.eclipse.collections.impl.block.factory.Predicates$AttributePredicate.<init>:(Lorg/eclipse/collections/api/block/function/Function;Lorg/eclipse/collections/api/block/predicate/Predicate;)V
         1: .line 635
            return
        end local 1 // org.eclipse.collections.api.block.function.Function newFunction
        end local 0 // org.eclipse.collections.impl.block.factory.Predicates$AttributeTrue this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0    2     0         this  Lorg/eclipse/collections/impl/block/factory/Predicates$AttributeTrue<TT;>;
            0    2     1  newFunction  Lorg/eclipse/collections/api/block/function/Function<-TT;Ljava/lang/Boolean;>;
    Signature: (Lorg/eclipse/collections/api/block/function/Function<-TT;Ljava/lang/Boolean;>;)V
    MethodParameters:
             Name  Flags
      newFunction  

  public java.lang.String toString();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // org.eclipse.collections.impl.block.factory.Predicates$AttributeTrue this
         0: .line 640
            new java.lang.StringBuilder
            dup
            ldc "Predicates.ifTrue("
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* this */
            getfield org.eclipse.collections.impl.block.factory.Predicates$AttributeTrue.function:Lorg/eclipse/collections/api/block/function/Function;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
            bipush 41
            invokevirtual java.lang.StringBuilder.append:(C)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            areturn
        end local 0 // org.eclipse.collections.impl.block.factory.Predicates$AttributeTrue this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/eclipse/collections/impl/block/factory/Predicates$AttributeTrue<TT;>;
}
Signature: <T:Ljava/lang/Object;>Lorg/eclipse/collections/impl/block/factory/Predicates$AttributePredicate<TT;Ljava/lang/Boolean;>;
SourceFile: "Predicates.java"
NestHost: org.eclipse.collections.impl.block.factory.Predicates
InnerClasses:
  protected AttributePredicate = org.eclipse.collections.impl.block.factory.Predicates$AttributePredicate of org.eclipse.collections.impl.block.factory.Predicates
  private final AttributeTrue = org.eclipse.collections.impl.block.factory.Predicates$AttributeTrue of org.eclipse.collections.impl.block.factory.Predicates
  private TrueEquals = org.eclipse.collections.impl.block.factory.Predicates$TrueEquals of org.eclipse.collections.impl.block.factory.Predicates