question: tests whether the token is an open bracket . concode_field_sep Token FUNCTION_ARG_SEPARATOR concode_elem_sep Kind kind concode_elem_sep Object content concode_field_sep Token buildFunction concode_elem_sep Operator.Associativity getAssociativity concode_elem_sep boolean isFunction concode_elem_sep int getPrecedence concode_elem_sep Function getFunction concode_elem_sep Kind getKind concode_elem_sep boolean isOperator concode_elem_sep Token buildOpenToken concode_elem_sep Token buildOperator concode_elem_sep Token buildLiteral concode_elem_sep boolean isFunctionArgumentSeparator concode_elem_sep boolean isLiteral concode_elem_sep String getLiteral concode_elem_sep boolean isCloseBracket concode_elem_sep Token buildCloseToken concode_elem_sep BracketPair getBrackets concode_elem_sep Operator getOperator
target: boolean function ( ) { return kind . equals ( Kind . OPEN_BRACKET ) ; }