https://spring.io/projects/spring-boot: Spring Boot (Pivotal Software, Inc.) 
public class org.springframework.boot.info.GitProperties extends org.springframework.boot.info.InfoProperties
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.springframework.boot.info.GitProperties
  super_class: org.springframework.boot.info.InfoProperties
{
  public void <init>(java.util.Properties);
    descriptor: (Ljava/util/Properties;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.springframework.boot.info.GitProperties this
        start local 1 // java.util.Properties entries
         0: .line 33
            aload 0 /* this */
            aload 1 /* entries */
            invokestatic org.springframework.boot.info.GitProperties.processEntries:(Ljava/util/Properties;)Ljava/util/Properties;
            invokespecial org.springframework.boot.info.InfoProperties.<init>:(Ljava/util/Properties;)V
         1: .line 34
            return
        end local 1 // java.util.Properties entries
        end local 0 // org.springframework.boot.info.GitProperties this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    2     0     this  Lorg/springframework/boot/info/GitProperties;
            0    2     1  entries  Ljava/util/Properties;
    MethodParameters:
         Name  Flags
      entries  

  public java.lang.String getBranch();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // org.springframework.boot.info.GitProperties this
         0: .line 41
            aload 0 /* this */
            ldc "branch"
            invokevirtual org.springframework.boot.info.GitProperties.get:(Ljava/lang/String;)Ljava/lang/String;
            areturn
        end local 0 // org.springframework.boot.info.GitProperties this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/springframework/boot/info/GitProperties;

  public java.lang.String getCommitId();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // org.springframework.boot.info.GitProperties this
         0: .line 49
            aload 0 /* this */
            ldc "commit.id"
            invokevirtual org.springframework.boot.info.GitProperties.get:(Ljava/lang/String;)Ljava/lang/String;
            areturn
        end local 0 // org.springframework.boot.info.GitProperties this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/springframework/boot/info/GitProperties;

  public java.lang.String getShortCommitId();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=1
        start local 0 // org.springframework.boot.info.GitProperties this
         0: .line 57
            aload 0 /* this */
            ldc "commit.id.abbrev"
            invokevirtual org.springframework.boot.info.GitProperties.get:(Ljava/lang/String;)Ljava/lang/String;
            astore 1 /* shortId */
        start local 1 // java.lang.String shortId
         1: .line 58
            aload 1 /* shortId */
            ifnull 3
         2: .line 59
            aload 1 /* shortId */
            areturn
         3: .line 61
      StackMap locals: java.lang.String
      StackMap stack:
            aload 0 /* this */
            invokevirtual org.springframework.boot.info.GitProperties.getCommitId:()Ljava/lang/String;
            astore 2 /* id */
        start local 2 // java.lang.String id
         4: .line 62
            aload 2 /* id */
            ifnonnull 6
         5: .line 63
            aconst_null
            areturn
         6: .line 65
      StackMap locals: java.lang.String
      StackMap stack:
            aload 2 /* id */
            invokevirtual java.lang.String.length:()I
            bipush 7
            if_icmple 7
            aload 2 /* id */
            iconst_0
            bipush 7
            invokevirtual java.lang.String.substring:(II)Ljava/lang/String;
            goto 8
      StackMap locals:
      StackMap stack:
         7: aload 2 /* id */
      StackMap locals:
      StackMap stack: java.lang.String
         8: areturn
        end local 2 // java.lang.String id
        end local 1 // java.lang.String shortId
        end local 0 // org.springframework.boot.info.GitProperties this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    9     0     this  Lorg/springframework/boot/info/GitProperties;
            1    9     1  shortId  Ljava/lang/String;
            4    9     2       id  Ljava/lang/String;

  public java.time.Instant getCommitTime();
    descriptor: ()Ljava/time/Instant;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // org.springframework.boot.info.GitProperties this
         0: .line 77
            aload 0 /* this */
            ldc "commit.time"
            invokevirtual org.springframework.boot.info.GitProperties.getInstant:(Ljava/lang/String;)Ljava/time/Instant;
            areturn
        end local 0 // org.springframework.boot.info.GitProperties this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/springframework/boot/info/GitProperties;

  private static java.util.Properties processEntries(java.util.Properties);
    descriptor: (Ljava/util/Properties;)Ljava/util/Properties;
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=3, locals=2, args_size=1
        start local 0 // java.util.Properties properties
         0: .line 81
            aload 0 /* properties */
            ldc "commit.time"
            invokestatic org.springframework.boot.info.GitProperties.coercePropertyToEpoch:(Ljava/util/Properties;Ljava/lang/String;)V
         1: .line 82
            aload 0 /* properties */
            ldc "build.time"
            invokestatic org.springframework.boot.info.GitProperties.coercePropertyToEpoch:(Ljava/util/Properties;Ljava/lang/String;)V
         2: .line 83
            aload 0 /* properties */
            ldc "commit.id"
            invokevirtual java.util.Properties.get:(Ljava/lang/Object;)Ljava/lang/Object;
            astore 1 /* commitId */
        start local 1 // java.lang.Object commitId
         3: .line 84
            aload 1 /* commitId */
            ifnull 5
         4: .line 86
            aload 0 /* properties */
            ldc "commit.id.full"
            aload 1 /* commitId */
            invokevirtual java.util.Properties.put:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            pop
         5: .line 88
      StackMap locals: java.lang.Object
      StackMap stack:
            aload 0 /* properties */
            areturn
        end local 1 // java.lang.Object commitId
        end local 0 // java.util.Properties properties
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    6     0  properties  Ljava/util/Properties;
            3    6     1    commitId  Ljava/lang/Object;
    MethodParameters:
            Name  Flags
      properties  

  private static void coercePropertyToEpoch(java.util.Properties, java.lang.String);
    descriptor: (Ljava/util/Properties;Ljava/lang/String;)V
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=3, locals=3, args_size=2
        start local 0 // java.util.Properties properties
        start local 1 // java.lang.String key
         0: .line 92
            aload 0 /* properties */
            aload 1 /* key */
            invokevirtual java.util.Properties.getProperty:(Ljava/lang/String;)Ljava/lang/String;
            astore 2 /* value */
        start local 2 // java.lang.String value
         1: .line 93
            aload 2 /* value */
            ifnull 3
         2: .line 94
            aload 0 /* properties */
            aload 1 /* key */
            aload 2 /* value */
            invokestatic org.springframework.boot.info.GitProperties.coerceToEpoch:(Ljava/lang/String;)Ljava/lang/String;
            invokevirtual java.util.Properties.setProperty:(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/Object;
            pop
         3: .line 96
      StackMap locals: java.lang.String
      StackMap stack:
            return
        end local 2 // java.lang.String value
        end local 1 // java.lang.String key
        end local 0 // java.util.Properties properties
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    4     0  properties  Ljava/util/Properties;
            0    4     1         key  Ljava/lang/String;
            1    4     2       value  Ljava/lang/String;
    MethodParameters:
            Name  Flags
      properties  
      key         

  private static java.lang.String coerceToEpoch(java.lang.String);
    descriptor: (Ljava/lang/String;)Ljava/lang/String;
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=3, locals=3, args_size=1
        start local 0 // java.lang.String s
         0: .line 107
            aload 0 /* s */
            invokestatic org.springframework.boot.info.GitProperties.parseEpochSecond:(Ljava/lang/String;)Ljava/lang/Long;
            astore 1 /* epoch */
        start local 1 // java.lang.Long epoch
         1: .line 108
            aload 1 /* epoch */
            ifnull 3
         2: .line 109
            aload 1 /* epoch */
            invokestatic java.lang.String.valueOf:(Ljava/lang/Object;)Ljava/lang/String;
            areturn
         3: .line 111
      StackMap locals: java.lang.Long
      StackMap stack:
            ldc "yyyy-MM-dd'T'HH:mm:ssZ"
            invokestatic java.time.format.DateTimeFormatter.ofPattern:(Ljava/lang/String;)Ljava/time/format/DateTimeFormatter;
            astore 2 /* format */
        start local 2 // java.time.format.DateTimeFormatter format
         4: .line 113
            aload 2 /* format */
            aload 0 /* s */
            invokedynamic queryFrom()Ljava/time/temporal/TemporalQuery;
              Bootstrap: invokestatic java.lang.invoke.LambdaMetafactory.metafactory:(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite;
                Method arguments:
                  (Ljava/time/temporal/TemporalAccessor;)Ljava/lang/Object;
                  java/time/Instant.from(Ljava/time/temporal/TemporalAccessor;)Ljava/time/Instant; (6)
                  (Ljava/time/temporal/TemporalAccessor;)Ljava/time/Instant;
            invokevirtual java.time.format.DateTimeFormatter.parse:(Ljava/lang/CharSequence;Ljava/time/temporal/TemporalQuery;)Ljava/lang/Object;
            checkcast java.time.Instant
            invokevirtual java.time.Instant.toEpochMilli:()J
            invokestatic java.lang.String.valueOf:(J)Ljava/lang/String;
         5: areturn
         6: .line 115
      StackMap locals: java.lang.String java.lang.Long java.time.format.DateTimeFormatter
      StackMap stack: java.time.format.DateTimeParseException
            pop
         7: .line 116
            aload 0 /* s */
            areturn
        end local 2 // java.time.format.DateTimeFormatter format
        end local 1 // java.lang.Long epoch
        end local 0 // java.lang.String s
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    8     0       s  Ljava/lang/String;
            1    8     1   epoch  Ljava/lang/Long;
            4    8     2  format  Ljava/time/format/DateTimeFormatter;
      Exception table:
        from    to  target  type
           4     5       6  Class java.time.format.DateTimeParseException
    MethodParameters:
      Name  Flags
      s     

  private static java.lang.Long parseEpochSecond(java.lang.String);
    descriptor: (Ljava/lang/String;)Ljava/lang/Long;
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=4, locals=1, args_size=1
        start local 0 // java.lang.String s
         0: .line 122
            aload 0 /* s */
            invokestatic java.lang.Long.parseLong:(Ljava/lang/String;)J
            ldc 1000
            lmul
            invokestatic java.lang.Long.valueOf:(J)Ljava/lang/Long;
         1: areturn
         2: .line 124
      StackMap locals:
      StackMap stack: java.lang.NumberFormatException
            pop
         3: .line 125
            aconst_null
            areturn
        end local 0 // java.lang.String s
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0     s  Ljava/lang/String;
      Exception table:
        from    to  target  type
           0     1       2  Class java.lang.NumberFormatException
    MethodParameters:
      Name  Flags
      s     
}
SourceFile: "GitProperties.java"
InnerClasses:
  public final Lookup = java.lang.invoke.MethodHandles$Lookup of java.lang.invoke.MethodHandles