Adds a name/value pair to the formatted output in name=value format. If value
is null, the string "null" is used, unless #omitNullValues() is
called, in which case this name/value pair will not be added.
Configures the ToStringHelper so #toString() will ignore properties with null
value. The order of calling this method, relative to the add()/addValue()
methods, is not significant.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-07-02 UTC."],[],[]]