https://github.com/google/guava/guava: Guava is a suite of core and expanded libraries that include utility classes, google's collections, io classes, and much much more. 
final class com.google.common.hash.SipHashFunction extends com.google.common.hash.AbstractHashFunction implements java.io.Serializable
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: com.google.common.hash.SipHashFunction
  super_class: com.google.common.hash.AbstractHashFunction
{
  static final com.google.common.hash.HashFunction SIP_HASH_24;
    descriptor: Lcom/google/common/hash/HashFunction;
    flags: (0x0018) ACC_STATIC, ACC_FINAL

  private final int c;
    descriptor: I
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final int d;
    descriptor: I
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final long k0;
    descriptor: J
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final long k1;
    descriptor: J
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 0

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=8, locals=0, args_size=0
         0: .line 39
            new com.google.common.hash.SipHashFunction
            dup
            iconst_2
            iconst_4
            ldc 506097522914230528
            ldc 1084818905618843912
            invokespecial com.google.common.hash.SipHashFunction.<init>:(IIJJ)V
         1: .line 38
            putstatic com.google.common.hash.SipHashFunction.SIP_HASH_24:Lcom/google/common/hash/HashFunction;
         2: .line 183
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  void <init>(int, int, long, long);
    descriptor: (IIJJ)V
    flags: (0x0000) 
    Code:
      stack=3, locals=7, args_size=5
        start local 0 // com.google.common.hash.SipHashFunction this
        start local 1 // int c
        start local 2 // int d
        start local 3 // long k0
        start local 5 // long k1
         0: .line 55
            aload 0 /* this */
            invokespecial com.google.common.hash.AbstractHashFunction.<init>:()V
         1: .line 57
            iload 1 /* c */
            ifle 2
            iconst_1
            goto 3
      StackMap locals: com.google.common.hash.SipHashFunction int int long long
      StackMap stack:
         2: iconst_0
      StackMap locals:
      StackMap stack: int
         3: ldc "The number of SipRound iterations (c=%s) during Compression must be positive."
            iload 1 /* c */
         4: .line 56
            invokestatic com.google.common.base.Preconditions.checkArgument:(ZLjava/lang/String;I)V
         5: .line 59
            iload 2 /* d */
            ifle 6
            iconst_1
            goto 7
      StackMap locals:
      StackMap stack:
         6: iconst_0
      StackMap locals:
      StackMap stack: int
         7: ldc "The number of SipRound iterations (d=%s) during Finalization must be positive."
            iload 2 /* d */
         8: .line 58
            invokestatic com.google.common.base.Preconditions.checkArgument:(ZLjava/lang/String;I)V
         9: .line 60
            aload 0 /* this */
            iload 1 /* c */
            putfield com.google.common.hash.SipHashFunction.c:I
        10: .line 61
            aload 0 /* this */
            iload 2 /* d */
            putfield com.google.common.hash.SipHashFunction.d:I
        11: .line 62
            aload 0 /* this */
            lload 3 /* k0 */
            putfield com.google.common.hash.SipHashFunction.k0:J
        12: .line 63
            aload 0 /* this */
            lload 5 /* k1 */
            putfield com.google.common.hash.SipHashFunction.k1:J
        13: .line 64
            return
        end local 5 // long k1
        end local 3 // long k0
        end local 2 // int d
        end local 1 // int c
        end local 0 // com.google.common.hash.SipHashFunction this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0   14     0  this  Lcom/google/common/hash/SipHashFunction;
            0   14     1     c  I
            0   14     2     d  I
            0   14     3    k0  J
            0   14     5    k1  J
    MethodParameters:
      Name  Flags
      c     
      d     
      k0    
      k1    

  public int bits();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.hash.SipHashFunction this
         0: .line 68
            bipush 64
            ireturn
        end local 0 // com.google.common.hash.SipHashFunction this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/hash/SipHashFunction;

  public com.google.common.hash.Hasher newHasher();
    descriptor: ()Lcom/google/common/hash/Hasher;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=8, locals=1, args_size=1
        start local 0 // com.google.common.hash.SipHashFunction this
         0: .line 73
            new com.google.common.hash.SipHashFunction$SipHasher
            dup
            aload 0 /* this */
            getfield com.google.common.hash.SipHashFunction.c:I
            aload 0 /* this */
            getfield com.google.common.hash.SipHashFunction.d:I
            aload 0 /* this */
            getfield com.google.common.hash.SipHashFunction.k0:J
            aload 0 /* this */
            getfield com.google.common.hash.SipHashFunction.k1:J
            invokespecial com.google.common.hash.SipHashFunction$SipHasher.<init>:(IIJJ)V
            areturn
        end local 0 // com.google.common.hash.SipHashFunction this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/hash/SipHashFunction;

  public java.lang.String toString();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // com.google.common.hash.SipHashFunction this
         0: .line 80
            new java.lang.StringBuilder
            dup
            ldc "Hashing.sipHash"
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* this */
            getfield com.google.common.hash.SipHashFunction.c:I
            invokevirtual java.lang.StringBuilder.append:(I)Ljava/lang/StringBuilder;
            aload 0 /* this */
            getfield com.google.common.hash.SipHashFunction.d:I
            invokevirtual java.lang.StringBuilder.append:(I)Ljava/lang/StringBuilder;
            ldc "("
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            aload 0 /* this */
            getfield com.google.common.hash.SipHashFunction.k0:J
            invokevirtual java.lang.StringBuilder.append:(J)Ljava/lang/StringBuilder;
            ldc ", "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            aload 0 /* this */
            getfield com.google.common.hash.SipHashFunction.k1:J
            invokevirtual java.lang.StringBuilder.append:(J)Ljava/lang/StringBuilder;
            ldc ")"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            areturn
        end local 0 // com.google.common.hash.SipHashFunction this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/hash/SipHashFunction;

  public boolean equals(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=3, args_size=2
        start local 0 // com.google.common.hash.SipHashFunction this
        start local 1 // java.lang.Object object
         0: .line 85
            aload 1 /* object */
            instanceof com.google.common.hash.SipHashFunction
            ifeq 4
         1: .line 86
            aload 1 /* object */
            checkcast com.google.common.hash.SipHashFunction
            astore 2 /* other */
        start local 2 // com.google.common.hash.SipHashFunction other
         2: .line 87
            aload 0 /* this */
            getfield com.google.common.hash.SipHashFunction.c:I
            aload 2 /* other */
            getfield com.google.common.hash.SipHashFunction.c:I
            if_icmpne 3
            aload 0 /* this */
            getfield com.google.common.hash.SipHashFunction.d:I
            aload 2 /* other */
            getfield com.google.common.hash.SipHashFunction.d:I
            if_icmpne 3
            aload 0 /* this */
            getfield com.google.common.hash.SipHashFunction.k0:J
            aload 2 /* other */
            getfield com.google.common.hash.SipHashFunction.k0:J
            lcmp
            ifne 3
            aload 0 /* this */
            getfield com.google.common.hash.SipHashFunction.k1:J
            aload 2 /* other */
            getfield com.google.common.hash.SipHashFunction.k1:J
            lcmp
            ifne 3
            iconst_1
            ireturn
      StackMap locals: com.google.common.hash.SipHashFunction
      StackMap stack:
         3: iconst_0
            ireturn
        end local 2 // com.google.common.hash.SipHashFunction other
         4: .line 89
      StackMap locals:
      StackMap stack:
            iconst_0
            ireturn
        end local 1 // java.lang.Object object
        end local 0 // com.google.common.hash.SipHashFunction this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    5     0    this  Lcom/google/common/hash/SipHashFunction;
            0    5     1  object  Ljava/lang/Object;
            2    4     2   other  Lcom/google/common/hash/SipHashFunction;
    RuntimeVisibleTypeAnnotations: 
      METHOD_FORMAL_PARAMETER
        org.checkerframework.checker.nullness.qual.Nullable()
    MethodParameters:
        Name  Flags
      object  

  public int hashCode();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=1, args_size=1
        start local 0 // com.google.common.hash.SipHashFunction this
         0: .line 94
            aload 0 /* this */
            invokevirtual java.lang.Object.getClass:()Ljava/lang/Class;
            invokevirtual java.lang.Object.hashCode:()I
            aload 0 /* this */
            getfield com.google.common.hash.SipHashFunction.c:I
            ixor
            aload 0 /* this */
            getfield com.google.common.hash.SipHashFunction.d:I
            ixor
            i2l
            aload 0 /* this */
            getfield com.google.common.hash.SipHashFunction.k0:J
            lxor
            aload 0 /* this */
            getfield com.google.common.hash.SipHashFunction.k1:J
            lxor
            l2i
            ireturn
        end local 0 // com.google.common.hash.SipHashFunction this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/hash/SipHashFunction;
}
SourceFile: "SipHashFunction.java"
NestMembers:
  com.google.common.hash.SipHashFunction$SipHasher
InnerClasses:
  private final SipHasher = com.google.common.hash.SipHashFunction$SipHasher of com.google.common.hash.SipHashFunction
    RuntimeVisibleAnnotations: 
      com.google.errorprone.annotations.Immutable()