array(8) {
  ["pa_materiales"]=>
  object(WC_Product_Attribute)#39305 (1) {
    ["data":protected]=>
    array(6) {
      ["id"]=>
      int(1)
      ["name"]=>
      string(13) "pa_materiales"
      ["options"]=>
      array(1) {
        [0]=>
        int(63)
      }
      ["position"]=>
      int(0)
      ["visible"]=>
      bool(true)
      ["variation"]=>
      bool(true)
    }
  }
  ["pa_color"]=>
  object(WC_Product_Attribute)#39304 (1) {
    ["data":protected]=>
    array(6) {
      ["id"]=>
      int(3)
      ["name"]=>
      string(8) "pa_color"
      ["options"]=>
      array(1) {
        [0]=>
        int(138)
      }
      ["position"]=>
      int(1)
      ["visible"]=>
      bool(true)
      ["variation"]=>
      bool(true)
    }
  }
  ["pa_marca"]=>
  object(WC_Product_Attribute)#39303 (1) {
    ["data":protected]=>
    array(6) {
      ["id"]=>
      int(4)
      ["name"]=>
      string(8) "pa_marca"
      ["options"]=>
      array(1) {
        [0]=>
        int(79)
      }
      ["position"]=>
      int(2)
      ["visible"]=>
      bool(true)
      ["variation"]=>
      bool(true)
    }
  }
  ["pa_capacidad"]=>
  object(WC_Product_Attribute)#39306 (1) {
    ["data":protected]=>
    array(6) {
      ["id"]=>
      int(5)
      ["name"]=>
      string(12) "pa_capacidad"
      ["options"]=>
      array(1) {
        [0]=>
        int(107)
      }
      ["position"]=>
      int(3)
      ["visible"]=>
      bool(true)
      ["variation"]=>
      bool(true)
    }
  }
  ["diametro-cm"]=>
  object(WC_Product_Attribute)#39301 (1) {
    ["data":protected]=>
    array(6) {
      ["id"]=>
      int(0)
      ["name"]=>
      string(14) "Diámetro (cm)"
      ["options"]=>
      array(1) {
        [0]=>
        string(4) "7.90"
      }
      ["position"]=>
      int(4)
      ["visible"]=>
      bool(true)
      ["variation"]=>
      bool(true)
    }
  }
  ["tamano-cm"]=>
  object(WC_Product_Attribute)#39302 (1) {
    ["data":protected]=>
    array(6) {
      ["id"]=>
      int(0)
      ["name"]=>
      string(12) "Tamaño (cm)"
      ["options"]=>
      array(1) {
        [0]=>
        string(5) "11.10"
      }
      ["position"]=>
      int(5)
      ["visible"]=>
      bool(true)
      ["variation"]=>
      bool(true)
    }
  }
  ["peso-gr"]=>
  object(WC_Product_Attribute)#39278 (1) {
    ["data":protected]=>
    array(6) {
      ["id"]=>
      int(0)
      ["name"]=>
      string(9) "Peso (gr)"
      ["options"]=>
      array(1) {
        [0]=>
        string(4) "8.70"
      }
      ["position"]=>
      int(6)
      ["visible"]=>
      bool(true)
      ["variation"]=>
      bool(true)
    }
  }
  ["pa_codigo-relacionados-forma"]=>
  object(WC_Product_Attribute)#39319 (1) {
    ["data":protected]=>
    array(6) {
      ["id"]=>
      int(2)
      ["name"]=>
      string(28) "pa_codigo-relacionados-forma"
      ["options"]=>
      array(1) {
        [0]=>
        int(152)
      }
      ["position"]=>
      int(7)
      ["visible"]=>
      bool(true)
      ["variation"]=>
      bool(true)
    }
  }
}

-----NULL

xxxxstring(13) "pa_materiales" bool(true)

xxxxstring(8) "pa_color" bool(true)

xxxxstring(8) "pa_marca" bool(true)

xxxxstring(12) "pa_capacidad" bool(true)

xxxxstring(14) "Diámetro (cm)" bool(false)

xxxxstring(12) "Tamaño (cm)" bool(false)

xxxxstring(9) "Peso (gr)" bool(false)

xxxxstring(28) "pa_codigo-relacionados-forma" bool(true)