### 成员变量

类型: String

#### # static readonly baseline

VerticalAlignment.baseline，baseline

Default Value:
  - 'baseline'

类型: String

#### # static readonly bottom

VerticalAlignment.bottom，bottom

Default Value:
  - 'bottom'

类型: String

#### # static readonly middle

VerticalAlignment.middle，middle

Default Value:
  - 'middle'

类型: String

#### # static readonly top

VerticalAlignment.top，top

Default Value:
  - 'top'