nl_tokens: Tests whether the given props object contains a property with the name of propNameOrFunction .
pl_tokens: function noProp ( props , propNameOrFunction ) { if ( ! props ) { throw <mask> Error ( 'Headful: You must pass all declared props when you use headful.props.x() calls.' ) ; } const propName = typeof propNameOrFunction === 'function' ? propNameOrFunction . name : propNameOrFunction ; return ! props . hasOwnProperty ( propName ) ; }