COMMON_REG top-level constant
          
          String
          const COMMON_REG
          
        
        
COMMON_REG: ^[?()=#~+%@.:\-_a-zA-Z0-9]+$
Implementation
const String COMMON_REG = r'^[?()=#~+%@.:\-_a-zA-Z0-9]+$';COMMON_REG: ^[?()=#~+%@.:\-_a-zA-Z0-9]+$
const String COMMON_REG = r'^[?()=#~+%@.:\-_a-zA-Z0-9]+$';