http://www.jooq.org/jooq: jOOQ effectively combines complex SQL, typesafety, source code generation, active records, stored procedures, advanced data types, and Java in a fluent, intuitive DSL. 
interface org.jooq.impl.F1<T1, R>
  minor version: 0
  major version: 59
  flags: flags: (0x0600) ACC_INTERFACE, ACC_ABSTRACT
  this_class: org.jooq.impl.F1
  super_class: java.lang.Object
{
  public abstract R apply();
    descriptor: (Ljava/lang/Object;)Ljava/lang/Object;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (TT1;)TR;
    MethodParameters:
      Name  Flags
      t1    
}
Signature: <T1:Ljava/lang/Object;R:Ljava/lang/Object;>Ljava/lang/Object;
SourceFile: "F.java"
    RuntimeVisibleAnnotations: 
      java.lang.FunctionalInterface()