https://github.com/eclipse-vertx/vertx-sql-client: The Reactive SQL Client (Eclipse) 
public interface io.vertx.sqlclient.impl.SqlClientInternal extends io.vertx.sqlclient.SqlClient
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: io.vertx.sqlclient.impl.SqlClientInternal
  super_class: java.lang.Object
{
  public abstract int appendQueryPlaceholder(java.lang.StringBuilder, int, int);
    descriptor: (Ljava/lang/StringBuilder;II)I
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
              Name  Flags
      queryBuilder  
      index         
      current       
}
SourceFile: "SqlClientInternal.java"