/// A cross of two diagonal lines from edge to edge crossing in an angle of 90 degrees, which is used for dismissal, used as a blank space in a circle.
///
/// See also:
///
/// * [clear], which is equivalent to the cross of this icon without a circle.
/// * [clear_circled_solid], which is similar, but uses a thinner cross.
/// A cross of two diagonal lines from edge to edge crossing in an angle of 90 degrees, which is used for dismissal, surrounded by circle. This icon is not filled in.
///
/// See also:
///
/// * [clear_circled_solid], which is similar, but filled in.
/// * [clear], which is the standalone cross of this icon.
/// A cross of two diagonal lines from edge to edge crossing in an angle of 90 degrees, which is used for dismissal, used as a blank space in a circle. This icon is filled in.
///
/// See also:
///
/// * [clear_circled], which is similar, but not filled in.
/// Two straight lines, one horizontal and one vertical, meeting in the middle, which is the equivalent of a plus sign, surrounded by a circle. This icon is not filled in.
///
/// See also:
///
/// * [plus_circled], which is the pre-iOS 7 version of this icon with a thicker cross and a filled in circle.
/// * [add_circled_solid], which is similar, but filled in.
/// Two straight lines, one horizontal and one vertical, meeting in the middle, which is the equivalent of a plus sign, surrounded by a circle. This icon is not filled in.
///
/// See also:
///
/// * [plus_circled], which is the pre-iOS 7 version of this icon with a thicker cross.
/// * [add_circled], which is similar, but not filled in.