Everything returns a selector that matches all labels.

NewRequirement is the constructor for a Requirement.

NewRequirement is the constructor for a Requirement.

NewSelector returns a nil selector.

NewParentChildSelector returns a nil parent child selector.

Nothing returns a selector that matches no labels.

PCRequirement contains a expression, a value, and an operator that relates the field and value.

Requirement contains a expression, a value, and an operator that relates the field and value.

Requirements is AND of all requirements.

Requirements is AND of all requirements.