http://nexus.sonatype.org/oss-repository-hosting.html/ST4: StringTemplate is a java template engine for generating source code, web pages, emails, or any other formatted text output. StringTemplate is particularly good at multi-targeted code generators, multiple site skins, and internationalization/localization. It evolved over years of effort developing jGuru.com. StringTemplate also powers the ANTLR 3 and 4 code generator. Its distinguishing characteristic is that unlike other engines, it strictly enforces model-view separation. Strict separation makes websites and code generators more flexible and maintainable; it also provides an excellent defense against malicious template authors. 
public class org.stringtemplate.v4.NumberRenderer implements org.stringtemplate.v4.AttributeRenderer
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.stringtemplate.v4.NumberRenderer
  super_class: java.lang.Object
{
  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.stringtemplate.v4.NumberRenderer this
         0: .line 42
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.stringtemplate.v4.NumberRenderer this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/stringtemplate/v4/NumberRenderer;

  public java.lang.String toString(java.lang.Object, java.lang.String, java.util.Locale);
    descriptor: (Ljava/lang/Object;Ljava/lang/String;Ljava/util/Locale;)Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=7, args_size=4
        start local 0 // org.stringtemplate.v4.NumberRenderer this
        start local 1 // java.lang.Object o
        start local 2 // java.lang.String formatString
        start local 3 // java.util.Locale locale
         0: .line 46
            aload 2 /* formatString */
            ifnonnull 1
            aload 1 /* o */
            invokevirtual java.lang.Object.toString:()Ljava/lang/String;
            areturn
         1: .line 47
      StackMap locals:
      StackMap stack:
            new java.util.Formatter
            dup
            aload 3 /* locale */
            invokespecial java.util.Formatter.<init>:(Ljava/util/Locale;)V
            astore 4 /* f */
        start local 4 // java.util.Formatter f
         2: .line 49
            aload 4 /* f */
            aload 2 /* formatString */
            iconst_1
            anewarray java.lang.Object
            dup
            iconst_0
            aload 1 /* o */
            aastore
            invokevirtual java.util.Formatter.format:(Ljava/lang/String;[Ljava/lang/Object;)Ljava/util/Formatter;
            pop
         3: .line 50
            aload 4 /* f */
            invokevirtual java.util.Formatter.toString:()Ljava/lang/String;
            astore 6
         4: .line 53
            aload 4 /* f */
            invokevirtual java.util.Formatter.close:()V
         5: .line 50
            aload 6
            areturn
         6: .line 52
      StackMap locals: org.stringtemplate.v4.NumberRenderer java.lang.Object java.lang.String java.util.Locale java.util.Formatter
      StackMap stack: java.lang.Throwable
            astore 5
         7: .line 53
            aload 4 /* f */
            invokevirtual java.util.Formatter.close:()V
         8: .line 54
            aload 5
            athrow
        end local 4 // java.util.Formatter f
        end local 3 // java.util.Locale locale
        end local 2 // java.lang.String formatString
        end local 1 // java.lang.Object o
        end local 0 // org.stringtemplate.v4.NumberRenderer this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    9     0          this  Lorg/stringtemplate/v4/NumberRenderer;
            0    9     1             o  Ljava/lang/Object;
            0    9     2  formatString  Ljava/lang/String;
            0    9     3        locale  Ljava/util/Locale;
            2    9     4             f  Ljava/util/Formatter;
      Exception table:
        from    to  target  type
           2     4       6  any
    MethodParameters:
              Name  Flags
      o             
      formatString  
      locale        
}
SourceFile: "NumberRenderer.java"