<itemvalue="The horizontal line used to align ideographic characters."/>
<itemvalue="The horizontal line used to align the bottom of glyphs for alphabetic characters. alphabetic, The horizontal line used to align ideographic characters. ideographic,"/>
<itemvalue="A horizontal line used for aligning text."/>
<itemvalue="Creates a new TextHeightBehavior object. applyHeightToFirstAscent: When true, the [TextStyle.height] modifier will be applied to the ascent of the first line. When false, the font's default ascent will be used. applyHeightToLastDescent: When true, the [TextStyle.height] modifier will be applied to the descent of the last line. When false, the font's default descent will be used. leadingDistribution: How the leading is distributed over and under text. All properties default to true (height modifications applied as normal)."/>
<itemvalue="{@template dart.ui.textHeightBehavior} Defines how to apply [TextStyle.height] over and under text. [TextHeightBehavior.applyHeightToFirstAscent] and [TextHeightBehavior.applyHeightToLastDescent] represent whether the [TextStyle.height] modifier will be applied to the corresponding metric. By default both properties are true, and [TextStyle.height] is applied as normal. When set to false, the font's default ascent will be used. [TextHeightBehavior.leadingDistribution] determines how the leading is distributed over and under text. This property applies before [TextHeightBehavior.applyHeightToFirstAscent] and [TextHeightBehavior.applyHeightToLastDescent]. {@endtemplate}"/>
<itemvalue="{@template cloud_firestore.collection_reference.doc} Returns a `DocumentReference` with the provided path. If no [path] is provided, an auto-generated ID is used. The unique key generated is prefixed with a client-generated timestamp so that the resulting list will be chronologically-sorted. {@endtemplate}"/>
<itemvalue="Whether the collection contains an element equal to [element]. This operation will check each element in order for being equal to [element], unless it has a more efficient way to find an element equal to [element]. The equality used to determine whether [element] is equal to an element of the iterable defaults to the [Object.==] of the element. Some types of iterable may have a different equality used for its elements. For example, a [Set] may have a custom equality (see [Set.identity]) that its `contains` uses. Likewise the `Iterable` returned by a [Map.keys] call should use the same equality that the `Map` uses for keys."/>
<itemvalue="The value for the given [key], or `null` if [key] is not in the map. Some maps allow `null` as a value. For those maps, a lookup using this operator cannot distinguish between a key not being in the map, and the key being there with a `null` value. Methods like [containsKey] or [putIfAbsent] can be used if the distinction is important."/>
