https://github.com/eclipse-vertx/vertx-sql-client: The Reactive MySQL client (Eclipse) 
public class io.vertx.mysqlclient.impl.MySQLPoolImpl extends io.vertx.sqlclient.impl.PoolBase<io.vertx.mysqlclient.impl.MySQLPoolImpl> implements io.vertx.mysqlclient.MySQLPool
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: io.vertx.mysqlclient.impl.MySQLPoolImpl
  super_class: io.vertx.sqlclient.impl.PoolBase
{
  private final io.vertx.mysqlclient.impl.MySQLConnectionFactory factory;
    descriptor: Lio/vertx/mysqlclient/impl/MySQLConnectionFactory;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  public void <init>(io.vertx.core.Context, boolean, io.vertx.mysqlclient.MySQLConnectOptions, io.vertx.sqlclient.PoolOptions);
    descriptor: (Lio/vertx/core/Context;ZLio/vertx/mysqlclient/MySQLConnectOptions;Lio/vertx/sqlclient/PoolOptions;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=5, args_size=5
        start local 0 // io.vertx.mysqlclient.impl.MySQLPoolImpl this
        start local 1 // io.vertx.core.Context context
        start local 2 // boolean closeVertx
        start local 3 // io.vertx.mysqlclient.MySQLConnectOptions connectOptions
        start local 4 // io.vertx.sqlclient.PoolOptions poolOptions
         0: .line 19
            aload 0 /* this */
            aload 1 /* context */
            iload 2 /* closeVertx */
            aload 4 /* poolOptions */
            invokespecial io.vertx.sqlclient.impl.PoolBase.<init>:(Lio/vertx/core/Context;ZLio/vertx/sqlclient/PoolOptions;)V
         1: .line 20
            aload 0 /* this */
         2: new io.vertx.mysqlclient.impl.MySQLConnectionFactory
            dup
            aload 1 /* context */
            invokestatic io.vertx.core.Vertx.currentContext:()Lio/vertx/core/Context;
            ifnull 3
            iconst_1
            goto 4
      StackMap locals: io.vertx.mysqlclient.impl.MySQLPoolImpl io.vertx.core.Context int io.vertx.mysqlclient.MySQLConnectOptions io.vertx.sqlclient.PoolOptions
      StackMap stack: io.vertx.mysqlclient.impl.MySQLPoolImpl new 2 new 2 io.vertx.core.Context
         3: iconst_0
      StackMap locals: io.vertx.mysqlclient.impl.MySQLPoolImpl io.vertx.core.Context int io.vertx.mysqlclient.MySQLConnectOptions io.vertx.sqlclient.PoolOptions
      StackMap stack: io.vertx.mysqlclient.impl.MySQLPoolImpl new 2 new 2 io.vertx.core.Context int
         4: aload 3 /* connectOptions */
            invokespecial io.vertx.mysqlclient.impl.MySQLConnectionFactory.<init>:(Lio/vertx/core/Context;ZLio/vertx/mysqlclient/MySQLConnectOptions;)V
            putfield io.vertx.mysqlclient.impl.MySQLPoolImpl.factory:Lio/vertx/mysqlclient/impl/MySQLConnectionFactory;
         5: .line 21
            return
        end local 4 // io.vertx.sqlclient.PoolOptions poolOptions
        end local 3 // io.vertx.mysqlclient.MySQLConnectOptions connectOptions
        end local 2 // boolean closeVertx
        end local 1 // io.vertx.core.Context context
        end local 0 // io.vertx.mysqlclient.impl.MySQLPoolImpl this
      LocalVariableTable:
        Start  End  Slot            Name  Signature
            0    6     0            this  Lio/vertx/mysqlclient/impl/MySQLPoolImpl;
            0    6     1         context  Lio/vertx/core/Context;
            0    6     2      closeVertx  Z
            0    6     3  connectOptions  Lio/vertx/mysqlclient/MySQLConnectOptions;
            0    6     4     poolOptions  Lio/vertx/sqlclient/PoolOptions;
    MethodParameters:
                Name  Flags
      context         
      closeVertx      
      connectOptions  
      poolOptions     

  public void connect(io.vertx.core.Handler<io.vertx.core.AsyncResult<io.vertx.sqlclient.impl.Connection>>);
    descriptor: (Lio/vertx/core/Handler;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // io.vertx.mysqlclient.impl.MySQLPoolImpl this
        start local 1 // io.vertx.core.Handler completionHandler
         0: .line 25
            aload 0 /* this */
            getfield io.vertx.mysqlclient.impl.MySQLPoolImpl.factory:Lio/vertx/mysqlclient/impl/MySQLConnectionFactory;
            aload 1 /* completionHandler */
            invokevirtual io.vertx.mysqlclient.impl.MySQLConnectionFactory.connect:(Lio/vertx/core/Handler;)V
         1: .line 26
            return
        end local 1 // io.vertx.core.Handler completionHandler
        end local 0 // io.vertx.mysqlclient.impl.MySQLPoolImpl this
      LocalVariableTable:
        Start  End  Slot               Name  Signature
            0    2     0               this  Lio/vertx/mysqlclient/impl/MySQLPoolImpl;
            0    2     1  completionHandler  Lio/vertx/core/Handler<Lio/vertx/core/AsyncResult<Lio/vertx/sqlclient/impl/Connection;>;>;
    Signature: (Lio/vertx/core/Handler<Lio/vertx/core/AsyncResult<Lio/vertx/sqlclient/impl/Connection;>;>;)V
    MethodParameters:
                   Name  Flags
      completionHandler  

  protected io.vertx.sqlclient.impl.SqlConnectionImpl wrap(io.vertx.core.Context, io.vertx.sqlclient.impl.Connection);
    descriptor: (Lio/vertx/core/Context;Lio/vertx/sqlclient/impl/Connection;)Lio/vertx/sqlclient/impl/SqlConnectionImpl;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=5, locals=3, args_size=3
        start local 0 // io.vertx.mysqlclient.impl.MySQLPoolImpl this
        start local 1 // io.vertx.core.Context context
        start local 2 // io.vertx.sqlclient.impl.Connection conn
         0: .line 30
            new io.vertx.mysqlclient.impl.MySQLConnectionImpl
            dup
            aload 0 /* this */
            getfield io.vertx.mysqlclient.impl.MySQLPoolImpl.factory:Lio/vertx/mysqlclient/impl/MySQLConnectionFactory;
            aload 1 /* context */
            aload 2 /* conn */
            invokespecial io.vertx.mysqlclient.impl.MySQLConnectionImpl.<init>:(Lio/vertx/mysqlclient/impl/MySQLConnectionFactory;Lio/vertx/core/Context;Lio/vertx/sqlclient/impl/Connection;)V
            areturn
        end local 2 // io.vertx.sqlclient.impl.Connection conn
        end local 1 // io.vertx.core.Context context
        end local 0 // io.vertx.mysqlclient.impl.MySQLPoolImpl this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    1     0     this  Lio/vertx/mysqlclient/impl/MySQLPoolImpl;
            0    1     1  context  Lio/vertx/core/Context;
            0    1     2     conn  Lio/vertx/sqlclient/impl/Connection;
    MethodParameters:
         Name  Flags
      context  
      conn     

  public void begin(io.vertx.core.Handler<io.vertx.core.AsyncResult<io.vertx.sqlclient.Transaction>>);
    descriptor: (Lio/vertx/core/Handler;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // io.vertx.mysqlclient.impl.MySQLPoolImpl this
        start local 1 // io.vertx.core.Handler handler
         0: .line 35
            new java.lang.UnsupportedOperationException
            dup
            ldc "Transaction is not supported for now"
            invokespecial java.lang.UnsupportedOperationException.<init>:(Ljava/lang/String;)V
            athrow
        end local 1 // io.vertx.core.Handler handler
        end local 0 // io.vertx.mysqlclient.impl.MySQLPoolImpl this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    1     0     this  Lio/vertx/mysqlclient/impl/MySQLPoolImpl;
            0    1     1  handler  Lio/vertx/core/Handler<Lio/vertx/core/AsyncResult<Lio/vertx/sqlclient/Transaction;>;>;
    Signature: (Lio/vertx/core/Handler<Lio/vertx/core/AsyncResult<Lio/vertx/sqlclient/Transaction;>;>;)V
    MethodParameters:
         Name  Flags
      handler  

  protected void doClose();
    descriptor: ()V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.vertx.mysqlclient.impl.MySQLPoolImpl this
         0: .line 40
            aload 0 /* this */
            getfield io.vertx.mysqlclient.impl.MySQLPoolImpl.factory:Lio/vertx/mysqlclient/impl/MySQLConnectionFactory;
            invokevirtual io.vertx.mysqlclient.impl.MySQLConnectionFactory.close:()V
         1: .line 41
            aload 0 /* this */
            invokespecial io.vertx.sqlclient.impl.PoolBase.doClose:()V
         2: .line 42
            return
        end local 0 // io.vertx.mysqlclient.impl.MySQLPoolImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lio/vertx/mysqlclient/impl/MySQLPoolImpl;

  public io.vertx.mysqlclient.MySQLPool preparedQuery(java.lang.String, io.vertx.sqlclient.Tuple, java.util.stream.Collector, io.vertx.core.Handler);
    descriptor: (Ljava/lang/String;Lio/vertx/sqlclient/Tuple;Ljava/util/stream/Collector;Lio/vertx/core/Handler;)Lio/vertx/mysqlclient/MySQLPool;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=5, locals=5, args_size=5
         0: .line 1
            aload 0
            aload 1
            aload 2
            aload 3
            checkcast java.util.stream.Collector
            aload 4
            checkcast io.vertx.core.Handler
            invokevirtual io.vertx.mysqlclient.impl.MySQLPoolImpl.preparedQuery:(Ljava/lang/String;Lio/vertx/sqlclient/Tuple;Ljava/util/stream/Collector;Lio/vertx/core/Handler;)Lio/vertx/sqlclient/SqlClient;
            checkcast io.vertx.mysqlclient.MySQLPool
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public io.vertx.mysqlclient.MySQLPool preparedQuery(java.lang.String, java.util.stream.Collector, io.vertx.core.Handler);
    descriptor: (Ljava/lang/String;Ljava/util/stream/Collector;Lio/vertx/core/Handler;)Lio/vertx/mysqlclient/MySQLPool;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=4, locals=4, args_size=4
         0: .line 1
            aload 0
            aload 1
            aload 2
            checkcast java.util.stream.Collector
            aload 3
            checkcast io.vertx.core.Handler
            invokevirtual io.vertx.mysqlclient.impl.MySQLPoolImpl.preparedQuery:(Ljava/lang/String;Ljava/util/stream/Collector;Lio/vertx/core/Handler;)Lio/vertx/sqlclient/SqlClient;
            checkcast io.vertx.mysqlclient.MySQLPool
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public io.vertx.mysqlclient.MySQLPool preparedQuery(java.lang.String, io.vertx.sqlclient.Tuple, io.vertx.core.Handler);
    descriptor: (Ljava/lang/String;Lio/vertx/sqlclient/Tuple;Lio/vertx/core/Handler;)Lio/vertx/mysqlclient/MySQLPool;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=4, locals=4, args_size=4
         0: .line 1
            aload 0
            aload 1
            aload 2
            aload 3
            invokevirtual io.vertx.mysqlclient.impl.MySQLPoolImpl.preparedQuery:(Ljava/lang/String;Lio/vertx/sqlclient/Tuple;Lio/vertx/core/Handler;)Lio/vertx/sqlclient/SqlClient;
            checkcast io.vertx.mysqlclient.MySQLPool
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public io.vertx.mysqlclient.MySQLPool preparedQuery(java.lang.String, io.vertx.core.Handler);
    descriptor: (Ljava/lang/String;Lio/vertx/core/Handler;)Lio/vertx/mysqlclient/MySQLPool;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=3, locals=3, args_size=3
         0: .line 1
            aload 0
            aload 1
            aload 2
            invokevirtual io.vertx.mysqlclient.impl.MySQLPoolImpl.preparedQuery:(Ljava/lang/String;Lio/vertx/core/Handler;)Lio/vertx/sqlclient/SqlClient;
            checkcast io.vertx.mysqlclient.MySQLPool
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public io.vertx.mysqlclient.MySQLPool query(java.lang.String, java.util.stream.Collector, io.vertx.core.Handler);
    descriptor: (Ljava/lang/String;Ljava/util/stream/Collector;Lio/vertx/core/Handler;)Lio/vertx/mysqlclient/MySQLPool;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=4, locals=4, args_size=4
         0: .line 1
            aload 0
            aload 1
            aload 2
            checkcast java.util.stream.Collector
            aload 3
            checkcast io.vertx.core.Handler
            invokevirtual io.vertx.mysqlclient.impl.MySQLPoolImpl.query:(Ljava/lang/String;Ljava/util/stream/Collector;Lio/vertx/core/Handler;)Lio/vertx/sqlclient/SqlClient;
            checkcast io.vertx.mysqlclient.MySQLPool
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public io.vertx.mysqlclient.MySQLPool query(java.lang.String, io.vertx.core.Handler);
    descriptor: (Ljava/lang/String;Lio/vertx/core/Handler;)Lio/vertx/mysqlclient/MySQLPool;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=3, locals=3, args_size=3
         0: .line 1
            aload 0
            aload 1
            aload 2
            invokevirtual io.vertx.mysqlclient.impl.MySQLPoolImpl.query:(Ljava/lang/String;Lio/vertx/core/Handler;)Lio/vertx/sqlclient/SqlClient;
            checkcast io.vertx.mysqlclient.MySQLPool
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public io.vertx.mysqlclient.MySQLPool preparedBatch(java.lang.String, java.util.List, java.util.stream.Collector, io.vertx.core.Handler);
    descriptor: (Ljava/lang/String;Ljava/util/List;Ljava/util/stream/Collector;Lio/vertx/core/Handler;)Lio/vertx/mysqlclient/MySQLPool;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=5, locals=5, args_size=5
         0: .line 1
            aload 0
            aload 1
            aload 2
            aload 3
            checkcast java.util.stream.Collector
            aload 4
            checkcast io.vertx.core.Handler
            invokevirtual io.vertx.mysqlclient.impl.MySQLPoolImpl.preparedBatch:(Ljava/lang/String;Ljava/util/List;Ljava/util/stream/Collector;Lio/vertx/core/Handler;)Lio/vertx/sqlclient/SqlClient;
            checkcast io.vertx.mysqlclient.MySQLPool
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public io.vertx.mysqlclient.MySQLPool preparedBatch(java.lang.String, java.util.List, io.vertx.core.Handler);
    descriptor: (Ljava/lang/String;Ljava/util/List;Lio/vertx/core/Handler;)Lio/vertx/mysqlclient/MySQLPool;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=4, locals=4, args_size=4
         0: .line 1
            aload 0
            aload 1
            aload 2
            aload 3
            invokevirtual io.vertx.mysqlclient.impl.MySQLPoolImpl.preparedBatch:(Ljava/lang/String;Ljava/util/List;Lio/vertx/core/Handler;)Lio/vertx/sqlclient/SqlClient;
            checkcast io.vertx.mysqlclient.MySQLPool
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Lio/vertx/sqlclient/impl/PoolBase<Lio/vertx/mysqlclient/impl/MySQLPoolImpl;>;Lio/vertx/mysqlclient/MySQLPool;
SourceFile: "MySQLPoolImpl.java"